Question 1

Which of the following best describes the concept of electronegativity?

Accepted Answer

The ability of an atom to attract electrons in a chemical bond.

Question 2

According to the periodic table, which element is expected to have the highest electronegativity?

Accepted Answer

Fluorine

Question 3

What is the bond angle between electron groups in a molecule with trigonal planar electron geometry?

Accepted Answer

$$120^\circ$$

Question 4

Which of the following molecules is NOT capable of having resonance structures?

Accepted Answer

H$$_2O$$

Question 5

How many bonding electrons are present in the Lewis structure of carbon monoxide (CO)?

Accepted Answer

6

Question 6

Which of the following compounds is both a polar molecule and has a linear molecular geometry?

Accepted Answer

HCN

Question 7

A student draws the Lewis structure for Cl$$_2. $$How many lone pairs are present on each chlorine atom?

Accepted Answer

3

Question 8

Which of the following best explains why water (H$$_2O) is a $$polar molecule?

Accepted Answer

It has a bent molecular geometry and a difference in electronegativity between H and O.

Question 9

What is the predicted bond angle in a molecule with tetrahedral electron geometry?

Accepted Answer

$$109.5^\circ$$

Question 10

Which of the following best represents the Lewis structure for the potassium ion (K$$^+$$)?

Accepted Answer

K$$^+$$

Question 11

How many valence electrons are present in the Lewis structure of the cyanide ion (CN$$^-$$)?

Accepted Answer

10

Question 12

Which of the following molecules contains a polar covalent bond?

Accepted Answer

NH$$_3$$

Question 13

Which symbol should be used between two structures that represent resonance structures?

Accepted Answer

$$\leftrightarrow$$

Question 14

A compound is formed between barium and aluminum. What is the predicted formula for this compound?

Accepted Answer

Ba$$_3Al$_2$$

Question 15

How many bonding electrons are in the Lewis structure of N$$_2$$?

Accepted Answer

6

Question 16

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between two atoms.

Question 17

Which molecule below has a linear molecular geometry and is nonpolar?

Accepted Answer

CO$$_2$$

Question 18

How many electrons are there in the Lewis structure of CCl$$_4$$?

Accepted Answer

32

Question 19

Which of the following best describes the trend in electronegativity across a period in the periodic table?

Accepted Answer

Electronegativity increases from left to right.

Question 20

Which of the following molecules is expected to have a bond angle closest to $$109.5^\circ$$?

Accepted Answer

CH$$_4$$

Chemical Bonding, Lewis Structures, and Molecular Geometry: Study Notes for CHM1032 (Ch. 10)

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