explain what is coastline matching

Answer:

Sounds like Wikipedia would be a good place to start for most of this information.

The Rutherford experiment was used to prove the existence of a positively charged nucleus containing the protons.

The Rutherford experiment was used to prove the existence of a positively charged nucleus..

Alpha particles passed mostly undeflected through a aluminum foil.

The part of the foil where the alpha particles were deflected  was the positively charged nucleus where most of the mass of the atom was concentrated.

In conclusion, the Rutherford experiment proved the existence of a positively charged nucleus.

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You should always wash your glasses well and make sure they are free from grease and detergent because they cause a haze in the beer .

Grease and detergent residues on glasses can negatively impact the appearance and quality of beer by causing a haze. When beer is poured into a glass, the presence of grease and detergent can interfere with the formation of a stable foam and result in a hazy appearance. This haze can affect the visual appeal of the beer and also impact the overall drinking experience.

Grease and detergent molecules have hydrophobic properties, meaning they repel water. When they come into contact with beer, they can disrupt the delicate balance between the liquid and gas phases in the foam, leading to a breakdown of the foam structure and a reduction in its stability. This can result in a less frothy and creamy foam, which is an important characteristic of beer.

To ensure the best beer-drinking experience, it is important to thoroughly wash glasses, removing any traces of grease and detergent. This helps to maintain the integrity of the foam, allowing it to form properly and enhance the sensory experience of enjoying a beer.

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Answer:

Phycical science is the study of the body.

Explanation:

s, p, d

Explanation:

the number of sublevels for an energy level is as follows:

for n = 1 : s

for n = 2 : s, p.

for n = 3 : s, p, d.

for n = 4 or higher : s, p, d, f.

The volume of a gas originally at standard temperature and pressure was recorded as 488.8 mL, the gas would occupy a volume of 5.97 mL at a pressure of 100.0 atm and temperature of -245.0 °C.

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:

(P₁V₁)/T₁ = (P₂V₂)/T₂

where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, respectively, and P₂, V₂, and T₂ are the final pressure, volume, and temperature, respectively.

We can first convert the initial temperature to Kelvin:

T₁ = 273.15 K (since it is at standard temperature)

Next, we can convert the final temperature to Kelvin:

T₂ = (-245.0 °C + 273.15) K = 28.15 K

We can then plug in the values and solve for V₂:

(1 atm x 488.8 mL) / 273.15 K = (100.0 atm x V₂) / 28.15 K

V₂ = (1 atm x 488.8 mL x 28.15 K) / (100.0 atm x 273.15 K) = 5.97 mL

Therefore, the gas would occupy a volume of 5.97 mL at a pressure of 100.0 atm and temperature of -245.0 °C.

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The reaction of 80.0 g of CH4 and 16.3 g of H2O produces 58.3 litres of H2 gas, with H2O serving as the limiting reagent.

                          To determine the limiting reagent and the amount of hydrogen gas produced, we need to write and balance the chemical equation for the reaction between methane (CH4) and water (H2O):
CH4 + H2O → CO + 3H2

From the balanced equation, we see that 1 mole of CH4 reacts with 1 mole of H2O to produce 3 moles of H2. Therefore, we need to first calculate the number of moles of each reactant provided:

moles of CH4 = 80.0 g / 16.04 g/mol = 4.98 mol

moles of H2O = 16.3 g / 18.02 g/mol = 0.905 mol

Next, we need to determine the limiting reagent by comparing the number of moles of each reactant to the stoichiometric ratio in the balanced equation. The reactant that produces fewer moles of H2 is the limiting reagent:From the balanced equation, 1 mole of CH4 produces 3 moles of H2, while 1 mole of H2O produces only 1 mole of H2. Therefore, H2O is the limiting reagent because it produces only 0.905 mol of H2, while CH4 would produce 14.94 mol of H2 (3 × 4.98 mol) if it were fully consumed.

Now, we can calculate the amount of H2 produced from the reaction with the limiting reagent, H2O:
moles of H2 = 0.905 mol H2O × 3 mol H2 / 1 mol H2O = 2.715 mol H2

Finally, we can convert the moles of H2 to liters of H2 at standard temperature and pressure (STP) using the ideal gas law:

V = nRT/P = (2.715 mol)(0.08206 L·atm/mol·K)(273.15 K) / (1 atm) = 58.3 L

Therefore, 58.3 liters of H2 gas can be produced from the reaction of 80.0 g of CH4 and 16.3 g of H2O, and H2O is the limiting reagent.

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Answer:

the answer to your question is D. 4.5 seconds hope this helps.

Explanation:

Explanation:

It explodes when a spark is present.. letter D

Answer:

A. It is flammable.

Explanation:

physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Answer:

Explanation:

well there is many things in our solar system and a moon is one of them. the moons in our solar system are big and small and orbit our planets. the moon is unique because it shines in the dark while it lets the sun shine in the light.

Thats what i would say but its an eh answer

Answer:

the advices are,

1. i would say him or her to give all information about not to do domestic violence who has doing it.

2. i would say him/ herto be strict towards the domestic violence.

3. i would suggest him or her to raise voice aganist towards the domestic violence.

5. i would suggest him or her to negotiate to them for theirbasic rights.

6. if its not possible then i would suggest him or her to complain to the police.

hope u like it ...

Answer:  If my friend has been suffering from domestic violence, then I will advice her to be strict towards domestic violence, believe in yourself, don't lose hope, provide the information about not doing domestic violence for who has doing it, I will suggest her to raise voice against it, to fight for the basic rights, If not possible then i would advice her to complain to police and if it is even worst then I will advice her to leave as soon as possible, make your own decision, etc These advice i would give if my friend has been suffering from domestic violence.

Explanation:

Hope it will help you...................

Answer:

The formula of ammonis is given as NH3

Explanation:

The given IUPAC name of ammonia is nitrogen trihydride.

From the name of IUPAC name of the ammonia it is evident that there is only one atom of nitrogen is present in one molecule of ammonia.

Word 'trihydride ' means a that there are three hydrogen atoms present as hydride in one ammonia molecule.

So, the formula of ammonia will be guven as: NH3

Answer:

it's NH3.....

Explanation:

so......

The photo shows the mineral calcite which upon reaction with dilute acid produce carbon dioxide gas. This gas is evolved out as bubbles.

Minerals are naturally occurring inorganic compounds with a definite composition and sharp edged crystalline structures. There are a number of mineral depositions in the nature made of calcium, phosphorous, sodium etc.

Calcite is a mineral made of calcium carbonate. Calcium carbonate is very abundant and essential mineral in the earth crust. When calcium carbonate reacts with mineral dilute acids, it gives carbon dioxide gas.

The reaction with HCl is given here:

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The image related to the question is given below:

\(\rm CaCO_{3} + 2HCl \rightarrow CaCl_{2} + H_{2}O + CO_{2}\)

The release of carbon dioxide gas is appearing as bubbles. Hence, the mineral is calcite.

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Sound waves is not the form of electromagnetic radiation.

The information regarding electromagnetic radiation is as follows:

Therefore we can conclude that sound waves is not the form of electromagnetic radiation.

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The mass of iron produced when 11.0 g of aluminum reacts with 30.0 g of iron (III) oxide is approximately 10.48 grams.

To determine the mass of iron produced when 11.0 g of aluminum reacts with 30.0 g of iron (III) oxide, we need to balance the chemical equation and perform stoichiometric calculations.

The balanced chemical equation for the reaction between aluminum and iron (III) oxide can be written as follows:

2 Al + Fe₂O₃ → 2 Fe + Al₂O₃

From the balanced equation, we can see that 2 moles of aluminum react with 1 mole of iron (III) oxide to produce 2 moles of iron and 1 mole of aluminum oxide.

Convert the given masses of aluminum and iron (III) oxide into moles.

Using the molar mass of aluminum (26.98 g/mol) and iron (III) oxide (159.69 g/mol), we can calculate the number of moles for each substance.

Number of moles of aluminum = mass of aluminum / molar mass of aluminum

= 11.0 g / 26.98 g/mol

= 0.408 moles

Number of moles of iron (III) oxide = mass of iron (III) oxide / molar mass of iron (III) oxide

= 30.0 g / 159.69 g/mol

= 0.188 moles

Determine the limiting reactant.

To determine the limiting reactant, we compare the stoichiometric ratio of aluminum to iron (III) oxide. From the balanced equation, we see that 2 moles of aluminum react with 1 mole of iron (III) oxide.

Given that we have 0.408 moles of aluminum and 0.188 moles of iron (III) oxide, we can calculate the moles of iron that can be produced from each reactant.

Moles of iron from aluminum = 2 * 0.408 moles = 0.816 moles

Moles of iron from iron (III) oxide = 0.188 moles

Since the moles of iron from aluminum (0.816 moles) is greater than the moles of iron from iron (III) oxide (0.188 moles), we can conclude that iron (III) oxide is the limiting reactant.

Calculate the mass of iron produced.

To calculate the mass of iron produced, we use the molar mass of iron (55.85 g/mol) and the number of moles of iron from the limiting reactant.

Mass of iron = moles of iron from iron (III) oxide * molar mass of iron

= 0.188 moles * 55.85 g/mol

= 10.48 g

Therefore, the mass of iron produced when 11.0 g of aluminum reacts with 30.0 g of iron (III) oxide is approximately 10.48 grams.

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The partial pressure exerted by the neon gas is 1.6 atm.

1. Determine the total moles of gas present in the system.
Total moles = moles of CO2 + moles of Ar + moles of N2 + moles of Ne
Total moles = 7.0 + 7.0 + 7.0 + 4.0 = 25.0 moles

2. Calculate the mole fraction of Ne.
Mole fraction of Ne = moles of Ne / total moles
Mole fraction of Ne = 4.0 / 25.0 = 0.16

3. Determine the partial pressure of Ne.
Partial pressure of Ne = mole fraction of Ne × total pressure
Partial pressure of Ne = 0.16 × 10.0 atm = 1.6 atm

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Answer:

64.2

Explanation:

2.8+17.8+13.7+8+21.9 = 64.2

A. The electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\).

B. The element belongs to period 3 and group 18.

C.The last electron's four quantum numbers are:

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

D. With fluorine, the element will develop an ionic connection.

The positioning of electrons within an atom, molecule, or other physical structure, such as a crystal, is referred to as electronic configuration. It is typically represented by an array of numbers, letters, or superscripts that denote the number of electrons in each atom or molecule's shell or subshell.

Let the first isotope's mass number be x, the second isotope's mass number be y, and the third isotope's mass number be z. Also, let the first isotope's neutron number be a, the second isotope's neutron number be b, and the third isotope's neutron number be c. Using the information provided, we can construct two equations:

126 = x + y + z (equation 1)

a+b+c=60 (equation 2)

Because all three isotopes contain the same amount of protons, we can infer that their electrical configurations are the same. As a result, all that remains is to determine the electrical structure of one of the isotopes.

We can use the fact that the total of the mass numbers is equal to the amount of protons plus the number of neutrons. Let m be the isotope's mass number and z be the number of protons (the atomic number). Then:

m = z + n, where n is the number of neutrons.

The electrical arrangement of an element can also be used to calculate the atomic number. Assume if the isotope we're seeking for is a periodic table element. The element's electrical configuration can be written as:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

The configuration's last electron is in the (n+1)s or (n+1)p orbital. As a result, we may calculate the atomic number by counting the number of electrons in the arrangement. For example, the atomic number for the aforementioned electrical configuration is 18 (2 + 8 + 8).

Let's look for the electrical configuration of the isotope we're after. Because the element's electrical configuration is not specified, we can presume it is a noble gas. As an example, consider argon (Ar), which has the electrical configuration:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

Because argon belongs to period 3 and group 18 (also known as group 8A), the isotope we seek belongs to period 3 and group 18. This is due to the fact that atoms in the same class have the same amount of valence electrons and chemical characteristics.

As a result, the electrical configuration of the isotope we seek is:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

b) The element belongs to period 3 and group 18.

c) The last electron's four quantum numbers are:

Because the electron is in the 3p orbital, n = 3 l = 1.

Because there are three 3p orbitals, m_l = -1, 0, or 1.

m_s = +1/2 or -1/2 (since the electron can spin up or spin down)

d) With fluorine, the element will develop an ionic connection. Because the element belongs to group 18, it has 8 valence electrons, making it a stable noble gas configuration. It may gain one electron to make a 1- ion or lose eight electrons to form an 8+ ion to obtain this state. Fluorine has seven valence electrons and can gain one electron to produce.

Therefore, the electronic configuration for the isotope we want is as follows:

\(1s^2 2s^2 2p^6 3s^2 3p^6\)

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Your question is in Spanish, but the English translation of the question is:

The sum of the mass numbers of three isotopes is 126 and the sum of the neutron numbers is 60. Find the electronic configuration of one of the isotopes if its electric charge is

1- b) Determine group and period for said element.

c) Determine the four quantum numbers for the last electron.

d) If the element they found joins with the fluorine element, what type of bond will it form?

Among the given gases, the gas that shows the greatest deviation from ideal behavior at 25 degrees Celsius and 1 atm is likely to be H2 (hydrogen).

1. Size and shape of molecules: Hydrogen gas (H2) consists of diatomic molecules that are very small in size. The size of the hydrogen molecule is relatively larger compared to other gases such as CH4 (methane), SO2 (sulfur dioxide), and O2 (oxygen). The small size of hydrogen molecules leads to a higher probability of molecular interactions and deviations from ideal behavior.

2. Intermolecular forces: Hydrogen gas has relatively weak intermolecular forces compared to other gases. Although it exhibits London dispersion forces, these forces are not as strong as the dipole-dipole interactions in molecules like SO2 and CH4 or the formation of double bonds in O2. The weaker intermolecular forces in hydrogen contribute to larger deviations from ideal behavior.

Based on the size and shape of molecules as well as the strength of intermolecular forces, hydrogen gas (H2) is expected to show the greatest deviation from ideal behavior among the given gases at 25 degrees Celsius and 1 atm.

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The pH and the pOH of an aqueous solution that is 0.045 M in HCl(aq) and 0.095 M in HBr(aq) at 25 °C is 1.35, and 12.98 respectively.

To calculate the pH and pOH of the solution, we need to use the concentration of the acidic solutions and the dissociation constants of HCl and HBr.

First, calculate the pH:

For HCl (aq):

[HCl] = 0.045 M

HCl is a strong acid and dissociates completely in water, so the concentration of H⁺ ions is equal to the concentration of HCl:

[H⁺] = 0.045 M

Taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.045)

pH = 1.35

Now, let's calculate the pOH:

For HBr(aq):

[HBr] = 0.095 M

HBr is also a strong acid, and its dissociation is similar to HCl. The concentration of H⁺ ions is equal to the concentration of HBr:

[H⁺] = 0.095 M

Again, taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.095)

pH = 1.02

Since pH + pOH = 14 (at 25 °C), we can calculate the pOH:

pOH = 14 - pH

pOH = 14 - 1.02

pOH = 12.98

Therefore, the pH of the solution is approximately 1.35, and the pOH is approximately 12.98.

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

Explanation:

Thermal Power Plants generate electricity by converting heat into electricity, essentially by burning a fuel. ... A coal power plant works in much the same way, but instead of a nuclear reactor heating water to make steam, the heat from the burning coal powers a steam turbine

Answer:

Solar energy can be used to push energy along power lines.

Explanation:

Im Might be wrong, might have to fact check it but im taking the test now so :)

Answer:

the answer is 1,3,2

Explanation:

Balance equation

Answer:

1,3,2

Explanation:

took test

The amount of the original isotope that remains after 30 days is 11.14.

The half life of a radioactive nuclide has to do with the time that it takes for only half of the original number of nuclides to remain.

Now;

No = 150 grams

N = ?

t1/2 = 8 days

t = 30 days

Then;

N/No = (1/2)^t/t1/2

N/150 = (1/2)^30/8

N/150 = (1/2)^3.75

N = (1/2)^3.75 * 150

N = 11.14

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Given the half-life, the amount remaining is 11.14 g

The half-life of idine-131 is 8 days.

Using the half-life formula:

Nt = No * (0.5)^(t/t1/2)

Amount remaining = 150 * (05)^(30/8)

Amount remaining = 11.14 g

In conclusion, the amount remaining is determined from the half-life of the substance.

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Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, to improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

(a) Direct expansion systems are those in which the refrigerant in the evaporator evaporates directly into the space to be cooled or frozen. The evaporator superheat is used to make sure that only vapor and no liquid is carried over into the suction line and compressor. Superheating is required for the following reasons :

(b) Forced draft and induced draft evaporators differ in the way air is introduced into them. In an induced draft evaporator, a fan or blower is positioned at the top of the evaporator, and air is drawn through the evaporator from the top. In a forced draft evaporator, air is propelled through the evaporator by a fan or blower that is located at the bottom of the evaporator. Forced draft evaporators are frequently used in direct expansion systems because they allow for better control of the air temperature. Because the air is directed upward through the evaporator and out of the top, an induced draft evaporator is less effective at keeping the air at a uniform temperature throughout the evaporator.

(c) (i) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant.

(ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant.

(iii) H2O is not classified as a refrigerant.

(d) The function of hydrogen gas in an absorption refrigeration system (NH3/H2O/H2) is to increase the heat of reaction between ammonia and water.

The pressure of hydrogen gas in the evaporator of an absorption refrigeration system can be determined using the formula, Pa/Pb = (Ta/Tb)^(deltaS/R),

where Pa = partial pressure of hydrogen in the evaporator, Ta = evaporating temperature, Tb = condensing temperature, Pb = partial pressure of hydrogen in the absorber, deltaS = entropy change between the absorber and evaporator, R = gas constant.

Substituting the given values, Ta = −2.0 ∘C = 271 K ; Tb = 38.0 ∘C = 311 K ; Pb = atmospheric pressure = 1 atm ;

deltaS = 4.7 kJ/kg K ; R = 8.314 kJ/mol K

we get, Pa/1 atm = (271/311)^(4.7/8.314)

Pa = 0.021 atm or 1.6 mmHg

Therefore, the partial pressure of hydrogen in the evaporator is 1.6 mmHg.

Thus, Direct expansion systems require the vapour exiting the evaporator to be superheated to avoid liquid slugging, o improve the effectiveness of the evaporator and to maintain the stability of the compressor. (B) Forced draft and induced draft evaporators differ in the way air is introduced into them. (C) CClF2CF3 (also known as R12) is a chlorofluorocarbon refrigerant. (ii) Tetrafluoroethane (also known as R134a) is a hydrofluorocarbon refrigerant and H2O is not classified as a refrigerant. (D) The partial pressure of hydrogen in the evaporator is 1.6 mmHg.

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The molar mass can be obtained from the number of moles of the gas. The molar mass of the gas is 70.3 g/mol.

We have to use the ideal gas equation;

PV = nRT

P = 0.9921 atm

V = 165 mL or 0.165 L

n = ?

R = 0.082 atmLK-1mol-1

T =  100 °C + 273 = 373 K

Now we have to find the number of moles (n)

n = PV/RT

n =  0.9921 atm × 0.165 L/0.082 atmLK-1mol-1 × 373 K

n = 0.164/30.6

n = 0.0054 moles

Since, number of moles = mass/molar mass

molar mass = 0.38g/0.0054 moles = 70.3 g/mol

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1. LiCl (Lithium chloride) CsBr (Cesium bromide) NaCl (Sodium chloride).

3. Group 1 elements, also known as alkali metals, form 1+ ions because they have one valence electron in their outermost energy level.

4. The formula of the sulfide ion is S2-.

5. The ions in NaCl stay together due to electrostatic attraction between the oppositely charged ions.

6. The formula of potassium sulfide is K2S. In this compound, potassium (K+) forms a 1+ ion, and sulfide (S2-) forms a 2- ion.

1. The three ionic compounds from the given list are:

LiCl (Lithium chloride)

CsBr (Cesium bromide)

NaCl (Sodium chloride)

Dot-and-cross diagrams for the three ionic compounds:

2. LiCl:

Li (Lithium) has 1 valence electron while Cl (Chlorine) has 7 valence electrons. The electron from Li is transferred to Cl, resulting in the formation of Li+ and Cl- ions. The dot-and-cross diagram would show Li with no dots and Cl with 8 dots around it.

CsBr:

Cs (Cesium) has 1 valence electron while Br (Bromine) has 7 valence electrons. Similar to LiCl, the electron from Cs is transferred to Br, resulting in Cs+ and Br- ions. The dot-and-cross diagram would show Cs with no dots and Br with 8 dots around it.

3. NaCl:

Na (Sodium) has 1 valence electron while Cl (Chlorine) has 7 valence electrons. Again, the electron from Na is transferred to Cl, forming Na+ and Cl- ions. The dot-and-cross diagram would show Na with no dots and Cl with 8 dots around it.

4. Group 1 elements, also known as alkali metals, form 1+ ions because they have one valence electron in their outermost energy level. These elements have a strong tendency to lose this valence electron to achieve a stable electron configuration similar to the noble gas configuration.

The formula of the sulfide ion is S2-.

5. The ions in NaCl stay together due to electrostatic attraction between the oppositely charged ions. In NaCl, the sodium (Na+) ion has a positive charge, and the chlorine (Cl-) ion has a negative charge. These opposite charges attract each other, forming an ionic bond.

The strong electrostatic attraction between Na+ and Cl- keeps the ions together in a crystal lattice structure.

6. The formula of potassium sulfide is K2S. In this compound, potassium (K+) forms a 1+ ion, and sulfide (S2-) forms a 2- ion. To balance the charges, two potassium ions are required for every sulfide ion.

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Answer:

Matter in a solid state has definite volume and definite shape.

Explanation:

The solid matter has the property of definite shape and volume because the molecules present in a solid are tightly packed so the molecules do not flow and there is no change in volume and force of attraction between the molecules will be very high that shows rigidity of molecule.