Question 1

Which of the following best describes the difference between ionic and covalent bonding?

Accepted Answer

Ionic bonding involves the transfer of electrons from a metal to a nonmetal, while covalent bonding involves the sharing of electrons between two nonmetals.

Question 2

According to the octet rule, atoms tend to gain, lose, or share electrons until they are surrounded by how many valence electrons?

Accepted Answer

$$8$$

Question 3

Which of the following statements about lattice energy is correct?

Accepted Answer

Lattice energy increases with increasing charge and decreasing ionic radius.

Question 4

Which of the following elements is most likely to form an expanded octet in a stable compound?

Accepted Answer

Phosphorus

Question 5

What is the formal charge on the central atom in the Lewis structure of $$\mathrm{NH_4$^+}$$?

Accepted Answer

$$0$$

Question 6

Which molecule below is best described as having resonance structures?

Accepted Answer

$$\mathrm{O_3$}$$

Question 7

Which of the following best explains why $$\mathrm{NaCl}$$ has a high melting point?

Accepted Answer

It contains strong electrostatic attractions between oppositely charged ions in a crystal lattice.

Question 8

Which of the following molecules contains a polar covalent bond?

Accepted Answer

$$\mathrm{HF}$$

Question 9

Given the following Lewis structure for water, how many lone pairs of electrons are on the oxygen atom?

$$\mathrm{H-O-H} ($$with two pairs of dots on O)

Accepted Answer

2

Question 10

Which of the following statements about bond order, bond length, and bond strength is correct?

Accepted Answer

As bond order increases, bond length decreases and bond strength increases.

Question 11

Which of the following best describes the electron configuration of a chloride ion ($$\mathrm{Cl^-}$$)?

Accepted Answer

Same as argon

Question 12

Which of the following is a correct statement about electronegativity?

Accepted Answer

Electronegativity increases from bottom to top within a group.

Question 13

Which of the following molecules is most likely to have a dipole moment?

Accepted Answer

$$\mathrm{H_2O}$$

Question 14

Which of the following is an exception to the octet rule?

Accepted Answer

$$\mathrm{BF_3$}$$

Question 15

Which of the following best describes the process of forming an ionic compound from its elements?

Accepted Answer

It involves both endothermic and exothermic steps, but overall is usually exothermic.

Question 16

Which of the following is the best Lewis structure for ozone ($$\mathrm{O_3$}$$)?

Accepted Answer

A resonance hybrid of two structures, each with one double and one single bond.

Question 17

Which of the following ions has the same electron configuration as neon?

Accepted Answer

$$\mathrm{Na^+}$$

Question 18

Which of the following best explains why $$\mathrm{BF_3$} is $$stable despite boron not having a complete octet?

Accepted Answer

Filling the octet would place a negative formal charge on boron and a positive formal charge on fluorine, which is not favorable.

Question 19

Which of the following best describes the difference between localized and delocalized electrons in resonance structures?

Accepted Answer

Localized electrons are specifically on one atom or shared between two atoms, while delocalized electrons are shared by multiple atoms.

Question 20

Which of the following is the correct formula for calculating the dipole moment ($$\mu) of a $$molecule?

Accepted Answer

$$\mu = Q 	imes r$$

Basic Concepts of Chemical Bonding: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard