Chapter 3

Question 1

Chemical bond

Answer 1

is the force of attraction between any two atoms in a compound

Question 2

Lewis symbol

Answer 2

uses atomic symbol to represent the nucleus and core electrons and dots to represent valence electrons

Question 3

Ionic Bonding

Answer 3

involves a transfer of one or more electrons from one atom to another.

Question 4

Covalent bonding

Answer 4

involves a sharing of electrons

Question 5

Ionic Bond

Answer 5

is the electrostatic force, the attraction of opposite charges resulting cation and anion

Question 6

Crystal Lattice

Answer 6

Positive and negative ions arrange themselves in a regular three-dimensional repeating array to produce a stable arrangement

Question 7

Covalent compounds consists of?

Answer 7

compounds containing only covalent bonds

Question 8

Molecules

Answer 8

are neutral (uncharged) species made up of two or more atoms joined by covalent bonds

Question 9

List the most obvious examples of diatomic molecules?

Answer 9

H2, N2, O2, F2, Cl2, Br2, I2

Question 10

Polar Covalent Bond

Answer 10

diatomic molecule composed of two different elements, not sharing electrons equally

Question 11

Electronegativity

Answer 11

measure of the ability of an atom to attract electrons in a chemical bond

Question 12

Monatomic Ions

Answer 12

ions consisting of a single atom

Question 13

Polyatomic ions

Answer 13

an example: OH- hydroxide ion, are composed of two or more atoms bonded together. These ions, although bonded to other ions with ionic bonds, are themselves held together by covalent bonds.

Question 14

Melting point

Answer 14

temperature at which a solid is converted to a liquid

Question 15

boiling point

Answer 15

is the temperature at which a liquid is covered to a gas a specified pressure

Question 16

Ionic solids are?

Answer 16

crystalline, characterized by a regular structure

Question 17

covalent solids are?

Answer 17

crystalline or have no regular structure (amorphous)

Question 18

Dissociation

Answer 18

an ionic solid, if soluble, will form positive and negative ions in solution

Question 19

triple bond

Answer 19

three pairs of electrons are shared by two atoms

Question 20

bond energy

Answer 20

amount of energy in units of kilocalories

Question 21

isomers

Answer 21

compounds that share the same molecular formula but have different structures

Question 22

resonance

Answer 22

when a compound has 2 or more lewis structures that contribute to the real structure

Question 23

monatomic ions

Answer 23

ions consisting of a single charge

Question 24

polyatomic ions

Answer 24

ions composed of 2 or more atoms bonded together with an overall positive or negative charge

Question 25

Electrolytes

Answer 25

ions present in solution allowing the solution to conduct electricity

Question 26

covalent solids usually do not do what?

Answer 26

dissociate and do not conduct electricity

Question 27

Order of melting point increasing

Answer 27

Non-polar, polar covalent, ionic