Vocab Terms

Question 1

Matter

Answer 1

Anything that has mass and takes up space

Question 2

Pure Substance

Answer 2

A single chemical, one kind of matter. Has a unique set of physical and chemical properties. Can not be separated by a physical change.

Question 3

Mixture

Answer 3

A sample of matter which contains 2 or more chemicals. Can be separated into parts by physical changes.

Question 4

Solution

Answer 4

A homogeneous mixture

Question 5

Homogeneous

Answer 5

A sample which has a uniform appearance and composition throughout

Question 6

Heterogeneous

Answer 6

Different phases, usually visable

Question 7

Element

Answer 7

A pure substance which cannot be separated into other stable pure substances

Question 8

Compound

Answer 8

A pure substance which can be decomposed by a chemical change into 2 or more other pure substances.

Question 9

Atom

Answer 9

The smallest unit particle of an element

Question 10

Physical Property

Answer 10

A measurable property that can be described by the senses

Question 11

Chemical Property

Answer 11

Properties defined by the types of chemical changes possible

Question 12

Physical Change

Answer 12

New form of old substance, no new substances formed

Question 13

Chemical Change

Answer 13

Old substance destroyed, new substance formed

Question 14

Law of Multiple Proportions

Answer 14

When 2 elements combine, it is always in a simple ratio of whole numbers

Question 15

Law of Conservation of Mass

Answer 15

In a chemical change, mass is conserved. It is neither created or destroyed.

Question 16

Law of Conservation of Energy

Answer 16

In a chemical change, energy is conserved. It is neither created or destroyed. Energy lost in one form is always gained in another form.

Question 17

Solid

Answer 17

Particle movement vibrates in fixed position. Shape is constant.

Question 18

Liquid

Answer 18

Particle movement is independent beneath the surface. Movement limited to the volume of liquid and shape of container.

Question 19

Gas

Answer 19

Particle movement is completely independent and random. Can go anywhere in a closed container.

Question 20

Exothermic

Answer 20

Energy is a product and is being released

Question 21

Endothermic

Answer 21

Energy is a reactant and is being absorbed

Question 22

Calorimetry

Answer 22

The measurement of heat transfer from one body to another

Question 23

Periodicity

Answer 23

Similar reactivity between elements in the same vertical column of the periodic table

Question 24

Ion

Answer 24

An atom which has lost or gained electrons and has become charged

Question 25

Binary Compound

Answer 25

A compound that is made up of one type of cation and one type of anion

Question 26

Volatility

Answer 26

The relative rate at which a liquid evaporates.

Question 27

Vapor Pressure

Answer 27

The pressure exerted by the molecules of a given vapor
(closed system).

Question 28

Boiling Point

Answer 28

The boiling point of a liquid is the temperature at which its vapor
pressure is the same as atmospheric pressure.

Question 29

Acid

Answer 29

A molecule which donates a hydrogen ion to another molecule (the base) in a pair

Question 30

Base

Answer 30

A molecule which accepts a hydrogen ion from an acid by way of a lone electron pair

Question 31

Strong Acid (identifier)

Answer 31

starts with H, exception: HF

Question 32

Weak Acid (identifier)

Answer 32

includes COOH

Question 33

Strong Base (identifier)

Answer 33

hydroxide salts (OH)

Question 34

Weak Base (identifier)

Answer 34

amines (includes N)