Chemistry Test 7

Question 1

Draw the Lewis Dot diagram for Ammonia (NH₃)

Answer 1

. H
|
H —— N —– H
. .

Question 2

Write the formula unit for Calcium (Ca) and Phosphorus (P)

Answer 2

Ca₃P₂

Question 3

Draw the Lewis Dot diagram for PCl₃

Answer 3

.. .. ..
:Cl ——- P ——- Cl:
.. | ..
:Cl:
..

Question 4

Write the formula unit for Potassium (K) and Nitrogen (N)

Answer 4

K₃N

Question 5

What type of bond is I₂

Answer 5

covalent bond

Question 6

What type of bond is Cu

Answer 6

Metallic Bond

Question 7

What type of bond is Fe₃Al

Answer 7

Metallic Bond

Question 8

What type of bond has attraction between oppositely charged ions?

Answer 8

Ionic Bond

Question 9

What type of bond shares one or more electrons?

Answer 9

Covalent Bond

Question 10

What type of bond does the electron-sea theory belong to?

Answer 10

Metallic Bonds

Question 11

Covalent bonds create

Answer 11

Molecules

Question 12

Ionic bonds create

Answer 12

Formula Units

Question 13

Bonds between two nonmetals.

Answer 13

Covalent bonds

Question 14

Bonds between a nonmental and a metal.

Answer 14

Ionic Bonds

Question 15

Bonds between metals

Answer 15

Metallic Bonds

Question 16

Diatomic molecules (naturally occurring.)

Answer 16

hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), chlorine (Cl2), bromine (Br2), and iodine (I2)

Question 16

(T or F) Diatomic elements such as I2 exhibit ionic bonding.

Answer 16

False

Question 17

(T or F) There are four unshared pairs of electrons in a water molecule.

Answer 17

False

Question 18

(T or F) The greater the difference in electronegativity between two elements, the greater the polarity of the resulting bond.

Answer 18

True

Question 19

Electrons are shared unevenly between two atoms due to a difference in their electronegativity.

Answer 19

Polar Compound

Question 20

A type of bond that occurs when two atoms share electrons equally.

Answer 20

A nonpolar compound

Question 21

(T or F) It is improper to refer to sodium chloride as a molecule

Answer 21

True

Question 22

(T or F) Ionic compounds have considerably lower boiling points than polar covalent compounds have.

Answer 22

False

Question 23

Chemical bonds between atoms involve the rearranging of __________ to maximize stability.

Answer 23

Electrons

Question 24

What type of bond would you expect in a compound of oxygen and sodium?

Answer 24

Ionic

Question 25

The electron-sea theory accounts for all the following characteristics of metals such as.

Answer 25

Luster, conductivity, and ductility

Question 26

An orderly arrangement of ions in a 3D pattern within a compound is called a(n) _________.

Answer 26

Crystal Lattice

Question 27

Why do atoms bond?

Answer 27

To gain stability and lose energy.

Question 28

A bond that forms between two or more atoms that have high electron affinities is most likely a(n) ____________.

Answer 28

Covalent Bond

Question 29

Examples of nonpolar covalent molecule.

Answer 29

F2, O2, Br2

Question 30

The polarity of a bond depends on the difference in the atom's ____________.

Answer 30

Electronegativities

Question 31

To achieve the octet when combining with potassium, would an atom of a Group 16 element be expected to lose, gain, or share electrons?

Answer 31

Gain

Question 32

The attraction between opposite electrical charges; holds covalent bonds together.

Answer 32

Electrostatic Force

Question 33

Most metals are likely to freely share electrons when bonding with each other because they have ______________.

Answer 33

Low electronegativities

Question 34

What is associated with ionic compounds?

Answer 34

Opposite charges attracting each other, hard, brittle solids, and formula units.

Question 35

Compounds formed by the attraction between oppositely charged ions are the result of _______.

Answer 35

Ionic Bonds

Question 36

The electron shared in a covalent bond are called a(n) _____________.

Answer 36

Bonding Pair

Question 37

Although they are made of two or more atoms, _______ often act as single charged particles in chemical reactions and solutions.

Answer 37

Polyatomic ions

Question 38

A mixture of atoms of a metal with another element where the mixture has metallic properties is called a(n) _____________.

Answer 38

Alloy

Question 39

In general, how do the stability and energy of bonded atoms compare with that of unbonded atoms?

Answer 39

Stability is greater and energy is lower for bonded atoms.

Question 40

How do intermolecular forces affect the melting point of a compound?

Answer 40

Stronger intermolecular forces within a compound increase the melting point.