Question 1

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

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^3$$

Question 2

According to the periodic trend, 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 H$$_3C$$–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$$^-$$)?

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 atom in HCN?

Accepted Answer

sp

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$$_6H$_6$$

Question 11

What is the atomic number of an atom with 6 protons, 6 neutrons, and 6 electrons?

Accepted Answer

6

Question 12

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

Accepted Answer

Pauli Exclusion Principle

Question 13

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same atomic number but different mass numbers.

Question 14

Which of the following molecules contains a carbonyl group?

Accepted Answer

CH$$_3$$COCH$$_3$$

Question 15

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

Accepted Answer

[Ne] $$3s^2$$ $$3p^5$$

Question 16

Which of the following best describes a resonance hybrid?

Accepted Answer

A composite of all major resonance structures

Question 17

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

Accepted Answer

4

Question 18

Which of the following molecules is nonpolar?

Accepted Answer

CO$$_2$$

Question 19

What is the formal charge on the oxygen atom in water (H$$_2O$$)?

Accepted Answer

0

Question 20

Which of the following best describes the difference between a valence electron and a shared electron?

Accepted Answer

A valence electron is found in the outermost shell, while a shared electron is involved in a chemical bond.

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

Study Guide - Practice Questions