Chemical Bond and Lewis Structure

Chem 201 /HW#10 Chapter 9

Electronegativity Table: use this table to answer Q [pic]

1. Bromine tends to form a monatomic ion which has the electronic configuration of a noble gas. What is the electron configuration of that noble gas?

a. 1s2 2s2 2p6 3s2 3p6 3d10 4p6 b. 1s2 2s2 2p6 3s2 3p6 4p6 4d10 c. 1s2 2s2 2p6 3s2 3p6 4s2 4p6 d. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 e. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10

2. Which ion of uranium has a noble gas configuration?

a. U2+ b. U3+ c. U4+ d. U6+ e. U2- 3. Which ion has a noble gas configuration?

a. Fe3+ b. Ni2+ c. Sc3+ d. V3+ e. Cr3+

4. Give the ground state electron configuration and number of unpaired electrons for V3+.

a. [Ar] 3d1; 2 unpaired electrons b. [Ar] ; 1 unpaired electron c. [Ar] 3d2; 2 unpaired electrons d. [Ar] 3d3; 3 unpaired electrons e. [Ar] 3d4; 4 unpaired electrons

5. Which metal ion is expected to have the electron configuration, [Kr]4d4? a. Mn2+ b. Ru2+ c. Zr2+ d. Mo2+ e Sr2+

6. Which species below has the least number of valence electrons in its Lewis symbol?

a. Ar+ b. Ga+ c. Mg2+ d. S2- e. F- 7. Which element below has six electrons surrounding its Lewis symbol?

a. Cr b. Ni c. Ba d. Se e. As

8. Which species has the most valence electrons in its Lewis symbol? (NOTE: the question has only one choice, Nothing wrong in it, just compare between the two choices and choose the one with more valence electrons)

a. Ar+ b. Ga+