Question 1

Which of the following electron configurations correctly represents the ground state of phosphorus (P, Z=15)?

Accepted Answer

1s2 2s2 2p6 3s2 3p3

Question 2

According to periodic trends, which element has the highest electronegativity among the following?

Accepted Answer

Cl

Question 3

Which statement best describes the octet rule for oxygen in the molecule H3COH?

Accepted Answer

Oxygen possesses 8 octet electrons: 6 valence and 2 shared electrons.

Question 4

What is the formal charge on the nitrogen atom in the ammonia molecule (NH_{3})?

Accepted Answer

0

Question 5

When drawing Lewis Dot Structures, which element should never be placed in the center of the molecule?

Accepted Answer

Hydrogen

Question 6

How many resonance structures are possible for the nitrate ion (NO_{3}-)?

Accepted Answer

3

Question 7

What is the hybridization of the central carbon atom in HCN?

Accepted Answer

sp1

Question 8

Which of the following molecules is polar?

Accepted Answer

NF_{3}

Question 9

Which functional group is present in the following structure: $$CH_{3}$$COOH?

Accepted Answer

Carboxylic acid

Question 10

Which of the following is a hydrocarbon?

Accepted Answer

$$C_{6}H$$_{6}

Question 11

What is the atomic number of carbon?

Accepted Answer

6

Question 12

Which isotope of hydrogen contains one proton, one neutron, and one electron?

Accepted Answer

Deuterium

Question 13

What is the charge of a hydride ion?

Accepted Answer

-1

Question 14

Which principle is being violated if two electrons in the same orbital have the same spin?

Accepted Answer

Pauli Exclusion Principle

Question 15

How many electron groups are around the central atom in a molecule with tetrahedral geometry?

Accepted Answer

4

Question 16

Which of the following molecules contains a carbonyl functional group?

Accepted Answer

$$CH_{3}$$COCH_{3}

Question 17

Which statement about resonance structures is correct?

Accepted Answer

Resonance structures differ only in the placement of electrons, not atoms.

Question 18

What is the condensed electron configuration for chlorine (Cl)?

Accepted Answer

[Ne] 3s2 3p5

Question 19

Which of the following best describes a nonpolar molecule?

Accepted Answer

A molecule with a perfect shape and no lone pairs on the central atom.

General Chemistry Study Notes: Atomic Structure, Bonding, and Molecular Properties

Study Guide - Practice Questions