$$\text{valence electrons} - \frac{1}{2}(\text{bonding electrons}) - \text{nonbonding electrons}$$

Question 1

Which of the following elements has the highest effective nuclear charge ($$Z_{eff}) $$for its outermost electron?

Accepted Answer

Al

Question 2

What is the condensed electron configuration for Ca$$^{2+}$$?

Accepted Answer

$$[Ar]$$

Question 3

Which species has the strongest S=O bond?

Accepted Answer

$$SO_3$$

Question 4

What is the molecular geometry and ideal bond angle of $$SO_3$$?

Accepted Answer

Trigonal planar, $$120^\	ext{o}$$

Question 5

Which of the following has the most negative electron affinity?

Accepted Answer

F

Question 6

Given the following ionization energy diagram, which element is most likely depicted?

Accepted Answer

Al

Question 7

What charge will Al have after its fifth ionization?

Accepted Answer

$$5^+$$

Question 8

Which of the following molecules is polar?

Accepted Answer

$$H_2S$$

Question 9

What is the formal charge on the central atom in $$SF_2O$$?

Accepted Answer

0

Question 10

Which element has the highest electronegativity according to the provided table?

Accepted Answer

F

Question 11

What is the bond order of $$SO_3$$ considering resonance?

Accepted Answer

$$\frac{2}{1.5}$$

Question 12

Which of the following ions is isoelectronic with Xe?

Accepted Answer

$$Ba^{2+}$$

Question 13

What is the maximum number of electrons that can occupy the 3d orbitals?

Accepted Answer

10

Question 14

Which element has a full outer shell and thus the most positive electron affinity?

Accepted Answer

Ne

Question 15

What is the formula for calculating lattice energy?

Accepted Answer

$$\frac{kQ_1Q_2}{d_{radius}}$$

Question 16

Which of the following statements about resonance structures is true?

Accepted Answer

The actual molecule is a hybrid of all resonance structures.

Question 17

What is the condensed electron configuration for Cu$$^{2+}$$?

Accepted Answer

$$[Ar] 3d^9$

Question 18

Which element has the lowest effective nuclear charge ($$Z_{eff}) $$for its outermost electron?

Accepted Answer

K

Question 19

Which of the following elements has electron configurations ending in $$ns^2np^6$?

Accepted Answer

Group 18 (noble gases)

Question 20

What is the formula for calculating formal charge?

Accepted Answer

$$	ext{valence electrons} - \frac{1}{2}(	ext{bonding electrons}) - 	ext{nonbonding electrons}$$

Atomic Structure, Electron Configuration, and Chemical Bonding: General Chemistry Study Notes

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