Ch. 8 Covalent Bonding

Question 1

Ionic substances are called ___ ___, while covalent substances are called ___.

Accepted Answer

formula units / molecules

Question 2

What information does a molecular formula, such as N2O (nitrous oxide), provide?

Accepted Answer

how many atoms of each element a substance contains

Question 3

In covalent bonds, electron sharing occurs so that atoms attain the e- configurations of ___.

Accepted Answer

noble gases

Question 4

A neutral group of atoms joined by covalent bonds is called a ___.

Accepted Answer

molecule

Question 5

Several atomic orbitals mix to form the same total number of equivalent orbitals, ___ occurs.

Accepted Answer

hybridization

Question 6

How many electrons are in a double covalent bond?

Accepted Answer

4

Question 7

Van der Waals forces include the 2weakest attractions between molecules, which are ___ and ___.

Accepted Answer

dipole interactions and dispersion forces

Question 8

Ionic substances are generally ___ at room temp, while covalent substances are ___.

Accepted Answer

solids / liquids or gases

Question 9

What symbols are used to mark a partial positive or negative charge in a molecule?

Accepted Answer

σ+ or σ-

Question 10

Molecular compounds are formed by the ___ of electrons.

Accepted Answer

sharing

Question 11

___ envision the bonding in molecules that cannot be described by a single structural formula

Accepted Answer

resonance structures

Question 12

The energy needed to break the bond between two covalently bonded atoms is ___ energy.

Accepted Answer

bond dissociation

Question 13

Which of these is correct for nitrogen, oxygen and argon in Earth's atmosphere?

Accepted Answer

N2, O2, Ar

Question 14

What affects the shape of a molecule made of three atoms? (bent or linear?)

Accepted Answer

unshared pairs of electrons

Question 15

When atoms are shared unequally, a ___ bond forms.

Accepted Answer

polar

Question 16

What does VSEPR theory stand for?

Accepted Answer

valence shell electron pair repulsion

Question 17

When the bonding electrons are shared equally, the bond formed is a ___ bond.

Accepted Answer

nonpolar

Question 18

Solids in which all of the atoms are covalently bonded to each other are called ___ .

Accepted Answer

network solids

Question 19

When different atoms bond, the more ___ atom attracts electrons more strongly.

Accepted Answer

electronegative

Question 20

Which of these is true about molecular (covalent) compounds?

Accepted Answer

share electrons

Question 21

___ are a tightly bound group of atoms with a positive or negative charge.

Accepted Answer

polyatomic ions

Question 22

A large bond dissociation energy corresponds to a ___ covalent bond.

Accepted Answer

strong

Questions 22