More Atomic Numbers, Elements, Octet Rule, & Valences.


1. Determine the possible oxidation numbers using the Octet Rule.

A) Oxygen _____ _____

B) Sodium _____ _____

C) Calcium _____ _____

D) Chlorine _____ _____

E) Nitrogen _____ _____

2. Determine the valence of the following elements.

A) Magnesium _____

B) Potassium _____

C) Silicon _____

D) Oxygen _____

E) Fluorine _____

3. How many neutrons does each of the following elements possess.

A) Magnesium _____

B) Lithium _____

C) Chromium _____

D) Sulfur _____

E) Carbon _____

4. How many protons in each of the following.

A) Nitrogen _____

B) Chlorine _____

C) Uranium _____

D) Gold _____

E) Iron _____

5. Name the seven energy levels and give the maximum number of electrons in each.

  1. _____ _____ 4. _____ _____ 7. _____ _____
  2. _____ _____ 5. _____ _____
  3. _____ _____ 6. _____ _____

6. How many electrons are found in each of the following elements.

A) Boron _____

B) Cobalt _____

C) Strontium _____

D) Sulfur _____

E) Silver _____

7. Name the sub-shells for the fifth energy level and the maximum number of electrons found in each.

8. Give the formula for the following polyatomic ions.

A) Sulfite

B) Peroxide

C) Nitrite

D) Dichromate

E) Hydroxide

9. Name each of the following polyatomic ions.

A) C2H3O2-

B) NO3-

C) SO4-2

D) CrO4-2

E) MnO4-

10. Write the electron configuration for each of the following:

A) Bromine

B) Calcium

11. Balance the following equation.

_____ KClO3 ----> _____ KCl + _____ O2


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