Chemistry

Front 1

Macroscopic

Back 1

Level that we directly observe with our senses

Front 2

Microscopic

Back 2

Particles that make up objects that we directly observe

Front 3

Solids

Back 3

Have close particles, a difinative shape, and volume

Front 4

Liquids

Back 4

Have particles that are farther apart, a volume, but no definate shape

Front 5

Gases

Back 5

Particles even more farther apart, with no definate shape or volume

Front 6

Change of state

Back 6

When a substance goes from one state of matter to another

Front 7

Melting
Melting point

Back 7

Solid to liquid
The temperature at which melting takes place

Front 8

Boiling
Boiling point

Back 8

Liquid to gas state
The point at which a substance begins to boil

Front 9

Condensation

Back 9

Gas to liquid state

Front 10

Freezing

Back 10

Liquid to solid state

Front 11

sublimation

Back 11

Solid to gas state with out ever becoming a liquid

Front 12

Deposition

Back 12

Goes directly from a gas to a solid state

Front 13

Pure substance

Back 13

definate and constant composition or make up
ex. salt or sand

Front 14

element

Back 14

composed of a single kind of atom

Front 15

atom

Back 15

smallest partcles of an element with the properties of an element

Front 16

protons

Back 16

subatomic particles partcles of an atom

Front 17

Compound

Back 17

Composed of two or more elements in a specific ratio

Front 18

Mixtures

Back 18

Physical combonations of pure substances that have no definate or constant composition

Front 19

Homogenous mixtures or solutions

Back 19

uniform in composition. same no matter who made it or where it was sampled

Front 20

Heterogenous mixtures

Back 20

Mixture whose compostion varies from postion to postion

Front 21

SI system

Back 21

worldwide measuring sysytem based on the old metric system. Interchangeable with metric system

Front 22

chemical properties

Back 22

enable a substance to change to a new substance and describe how a substance reacts with another substance

Front 23

Physical properties

Back 23

Mass, volume, color, ability to conduct electricity.

Front 24

Extensive properties

Back 24

depend on the amount of matter present.
Ex. Mass and volume

Front 25

Intensive properties

Back 25

does not depend on the amount of matter present
Ex. color and electricity

Front 26

Density

Back 26

equals mass (g)over volume (mL). Temp normally recorded with it

Front 27

Specific gravity

Back 27

Ratio of the density of a substance compared to the density of water at the same temperature

Front 28

Archimedes Principal

Back 28

Volume of a solid is equal to the amount of water that it displaces

Front 29

Energy

Back 29

The ability to do work

Front 30

Metric energy

Back 30

Energy of motion measured with a thermometer

Front 31

Laws of conservation of energy

Back 31

In ordinary chemical reactions, energey is neither created nor destroyed but converted from one form to another

Front 32

Potential energy

Back 32

is stored energy

Front 33

Chemical bonds

Back 33

Forces that holdatoms together in compounds

Front 34

Heat

Back 34

measures the total amount of energy a substance possesses

Front 35

Proton

Back 35

Positive charge. mass=1 found in the nucleus

Front 36

Neutron

Back 36

Neutral. mass=1. found in the nucleus

Front 37

Electron

Back 37

Negative. Mass=1 found outside the nucleus

Front 38

Mass Number

Back 38

sum of the number of protons and electrons

Front 39

Atomic number

Back 39

The number of protons in a given atom