Formal Charge=Valence Electrons-(Nonbonding Electrons+Bonds)

Question 1

Which of the following electron configurations correctly represents the condensed electron configuration for phosphorus (Z = 15)?

Accepted Answer

[Ne]3s23p3

Question 2

According to the periodic trend, which element has the highest electronegativity among the Group 7A elements?

Accepted Answer

Cl

Question 3

Which statement 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 nitrogen atom in the thiocyanate ion (SCN-)?

Accepted Answer

-1

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 (NO3-)?

Accepted Answer

3

Question 7

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

Accepted Answer

sp

Question 8

Which of the following molecules is polar?

Accepted Answer

NF3

Question 9

Which functional group is present in the following molecule: CH3COOH?

Accepted Answer

Carboxylic acid

Question 10

Which of the following is a hydrocarbon?

Accepted Answer

C6H6

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 in the electron configuration diagram where two electrons occupy the same orbital with parallel spins?

Accepted Answer

Pauli Exclusion Principle

Question 13

What is the formal charge on the central carbon atom in COCl2 if it forms two single bonds with Cl and a double bond with O?

Accepted Answer

0

Question 14

Which of the following statements about resonance structures is correct?

Accepted Answer

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

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 is nonpolar?

Accepted Answer

CO2

Question 17

What is the mass number of a carbon atom with 6 protons and 8 neutrons?

Accepted Answer

14

Question 18

Which of the following is the correct formula for calculating formal charge?

Accepted Answer

Formal&#xA0;Charge=Valence&#xA0;Electrons-(Nonbonding&#xA0;Electrons+Bonds)

Question 19

Which of the following best describes a resonance hybrid?

Accepted Answer

A composite of all major resonance structures.

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

Study Guide - Practice Questions