1. 1s²2s²2p⁶3s²3p⁶3d³4s² is the ground state electonic configuration of

(A) Ca
(B) Sc
(C) Zn
(D) V

2. The first ionization energy for a mole of magnesium atoms is the energy required for the process

(A) Mg(s) ----> Mg(g)
(B) Mg(g) ----> Mg⁺(g) + 2e¯
(C) Mg⁺(g) -----> Mg²⁺(g) + e¯
(D) Mg(g) ------> Mg⁺(g) + e¯

3. Element x, whose atoms have an outer-shell electron configuration ns²np⁴, is most likely to react chemically to form ions which have a charge of

(A) +2e
(B) +e
(C) -e
(D) -2e

4. The formula of the compound ammonium carbonate is

(A) NH₄CO₃
(B) NH₄CO₄
(C) NH₄HCO₃
(D) (NH₄)₂CO₃

5. Which statement regarding the properties of elements arranged in the Periodic Table is correct?

(A) Atomic sizes decrease going down a Group or Family.
(B) Atomic sizes increase going from Fr in Group I to F in Group VII.
(C) Atomic sizes decrease going from left to right in a Period.
(D) All atoms in the same Group have the same size.

6. In their stable compounds, alkaline earth metals normally exist as

(A) M⁺ cations
(B) M²⁺ cations
(C) M atoms
(D) M¯ anions

7. Hydrogen trioxide, H₂O₃, a highly unstable and reactive compound related to hydrogen peroxide, has been prepared recently in small amounts. Which Lewis electron dot structure is most likely to represent the structure of hydrogen trioxide?

8. The most likely molecule to be formed by the reaction of boron and chlorine is

(A) BCl
(B) BCl₃
(C) BCl₄
(D) BCl₆

9. In which compound would the molecules be expected to be linear?

(A) O₃
(B) SO₂
(C) H₂O
(D) CO₂

10. The shortest bond is that in

(A) F₂
(B) O₂
(C) N₂
(D) C₂

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