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

Question 1

Which principle states that electrons fill the lowest energy orbitals first when writing electron configurations?

Accepted Answer

Aufbau Principle

Question 2

What is the condensed electron configuration for phosphorus (Z = 15)?

Accepted Answer

[Ne]3s23p3

Question 3

Which element is the most electronegative in Group 7A?

Accepted Answer

F

Question 4

Electronegativity generally _______ as you move from left to right across a period and _______ as you move up a group.

Accepted Answer

increases; increases

Question 5

In the molecule $$H_{3}$$COH, how many valence and shared electrons does the oxygen atom possess?

Accepted Answer

6 valence electrons and 2 shared electrons

Question 6

What is the correct formula for calculating the formal charge of an atom?

Accepted Answer

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

Question 7

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

Accepted Answer

Hydrogen

Question 8

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

Accepted Answer

3

Question 9

What is the hybridization and number of unhybridized orbitals for the central atom in HCN?

Accepted Answer

sp hybridization; 2 unhybridized orbitals

Question 10

Which of the following molecules is polar?

Accepted Answer

NF_{3}

Question 11

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

Accepted Answer

Carboxylic acid

Question 12

Which of the following is a hydrocarbon?

Accepted Answer

CH_{4}

Question 13

What is the atomic number of an atom equal to?

Accepted Answer

The number of protons

Question 14

Which of the following hydrogen isotopes contains two neutrons?

Accepted Answer

Tritium

Question 15

What is the charge and electron count for a hydride ion $$(H^{-}$$)?

Accepted Answer

Charge: -1, Electrons: 2

Question 16

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

Accepted Answer

Pauli Exclusion Principle

Question 17

Which of the following best describes a resonance hybrid?

Accepted Answer

A composite of all major resonance structures

Question 18

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

Accepted Answer

4

Question 19

Which of the following molecules is nonpolar due to its perfect shape?

Accepted Answer

CO_{2}

Question 20

Which statement about the octet rule is correct?

Accepted Answer

Main group elements tend to achieve 8 electrons in their valence shell through chemical bonding

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

Study Guide - Practice Questions