Question 1

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

Accepted Answer

Ne1 s2 p3 s2 p3

Question 2

According to the periodic trend, which element below has the highest electronegativity?

Accepted Answer

F

Question 3

Which of the following statements is true regarding the oxygen atom in the molecule H3C-O-H?

Accepted Answer

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

Question 4

What is the formal charge on the central carbon atom in the thiocyanate ion (SCN-) if the Lewis structure is N&equiv;C&minus;S?

Accepted Answer

0

Question 5

Which of the following is NOT a correct step in drawing a Lewis Dot Structure?

Accepted Answer

Hydrogen can be placed in the center of the molecule.

Question 6

Which statement about resonance structures is correct?

Accepted Answer

The resonance hybrid is a composite of all major resonance structures.

Question 7

What is the hybridization of the central atom in HCN?

Accepted Answer

sp1

Question 8

Which of the following molecules is polar?

Accepted Answer

NF3

Question 9

Which functional group is present in the following structure: CH3-COOH?

Accepted Answer

Carboxylic acid

Question 10

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same atomic number but different mass numbers.

Question 11

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

Accepted Answer

Pauli Exclusion Principle

Question 12

What is the correct condensed electron configuration for chlorine (Z=17)?

Accepted Answer

Ne1 s2 p5

Question 13

Which of the following molecules is both organic and a hydrocarbon?

Accepted Answer

CH4

Question 14

Which of the following best describes a nonpolar molecule?

Accepted Answer

A molecule with a perfect shape and identical surrounding atoms.

Question 15

How many unhybridized p orbitals are present on the central atom in a molecule with linear geometry?

Accepted Answer

2

Question 16

Which of the following is the correct formal charge calculation for oxygen in water (H2O)?

Accepted Answer

6&minus;(4+2)=0

Question 17

Which of the following best explains why CO2 is a nonpolar molecule?

Accepted Answer

It has polar bonds but a linear, symmetric shape.

Question 18

Which of the following is a correct statement about the octet rule?

Accepted Answer

Most main group elements tend to achieve 8 valence electrons through bonding.

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

Study Guide - Practice Questions