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Butoxors [25]
3 years ago
6

The number of valence electrons in an atom with an electron configuration is 1s2 2s2 2p6 3s2 3p4

Chemistry
1 answer:
Alex_Xolod [135]3 years ago
7 0

Answer:

6 valence electrons

Explanation:

The atom you have given is a sulfur atom. It has 6 valence electrons.

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(a) What is the charge density of an ion, and what two properties of an ion affect it?
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Charge density is the ratio of the charge of ions to the volume of ions.

<h3> Factor affecting charge density</h3>

It depends on the following properties of ion as

  • Charge on the ion.
  • Volume of the ions.

The lithium ion, Li⁺, has half of the radius of the potassium ion, K⁺. That is why, Li⁺ have a electric field 4 times stronger than the electric field of K⁺ and thus it have 4 times stronger force of attraction.

All the ions: Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, have the similar electric charge +1.6×10⁻¹⁹ C. As we know that, volume is directly proportional to the third power of their radius. Therefore, smaller ions have less charge density than bigger one.

We can say that charge density decreases down across period due to decrease in the radius which further reduces the volume of ions.

Charge density increases along group due to increase in the radius which further increases the volume of ions.

Thus, we can say that charge density depends on the charge and volume of the ions.

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Predict the effect of removing chloride ions Now remove some of the free chloride ions by adding some silver nitrate (Hint: add
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The addition of silver nitrate will favor the forward reaction which is the precipitation of AgCl.

The addition of HCl will favor the formation of free chloride ions.

The given reaction is exothermic.

<h3>What is the effect in equilibrium when free chloride ions are removed from the precipitation reaction of silver chloride?</h3>

A precipitation reaction is a reaction in which an insoluble compound is obtained when two solutions of salt are mixed together.

In the given precipitation reaction, the equilibrium equation is given as follows:

AgNO₃ (aq)  ⇄ Ag⁺ (aq) + NO₃⁻ (aq)

Ag⁺ (aq) + Cl⁻ (aq) ⇄ AgCl

AgNO₃ (aq) + Cl⁻ (aq) ⇄ AgCl (s) + NO₃⁻ (aq)

From the equation above, the removal of the free chloride ions will favor the formation of the product, silver chloride, AgCl, and the dissociation of more AgNO₃ (aq).

The reaction is an endothermic reaction.

Now when HCl is added to the reaction, there are more the reaction will favor the dissociation of HCl to form free chloride ions as seen in the equation below:

HCl (aq) ⇄ H⁺ (aq) + Cl⁻ (aq)

The reaction is an exothermic reaction.

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How are petrified fossils similar to preserved remains? How are they different?
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Well, both fossils and preserved remains retain the shape and form of the remains, but fossils do not actually retain the matter that made up the remains, instead, bones and tissues (usually just bones) have been replaced with stone.


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