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

Formal Charge=Valence Electrons−(Nonbonding Electrons+Bonding Electrons2)

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 following?

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 the correct order of steps for drawing a Lewis Dot Structure for CO2?

Accepted Answer

Count valence electrons, connect atoms with single bonds, add electrons to outer atoms, place remaining electrons on central atom, form double/triple bonds if needed, check formal charges.

Question 6

Which of the following statements about resonance structures is correct?

Accepted Answer

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

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

NF3

Question 9

Which functional group is present in the following molecule: CH_{3}-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 in the following electron configuration diagram for carbon: 2p2 with both electrons paired in the same orbital?

Accepted Answer

Hund's Rule

Question 12

What is the correct number of protons, neutrons, and electrons in D+ (deuterium ion)?

Accepted Answer

Protons: 1, Neutrons: 1, Electrons: 0

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 resonance hybrid?

Accepted Answer

A composite of all major resonance structures.

Question 15

How many unhybridized p orbitals are present on the central atom in a molecule with sp2 hybridization?

Accepted Answer

2

Question 16

Which of the following best explains why CO2 is a nonpolar molecule despite having polar bonds?

Accepted Answer

The molecule is linear, and the bond dipoles cancel each other out.

Question 17

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

Accepted Answer

Formal Charge=Valence Electrons&minus;(Nonbonding Electrons+Bonding Electrons2)

Question 18

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve 8 electrons in their outer shell.

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

Study Guide - Practice Questions

Study Guide - Flashcards