Chemistry Unit 1

Question 1

What is matter?

Answer 1

anything that has mass and takes up space (volume)

Question 2

Mass

Answer 2

the amount of matter in an object

Question 3

Weight

Answer 3

A measure of the force of gravity on an object

Question 4

Pure Substances

Answer 4

have a fixed composition or properties

Question 5

What are elements?

Answer 5

Any material that is made up of only one type of atom. Any substance that cannot be broken down into a simpler-one by a chemical reaction.

Question 6

`Monatomic

Answer 6

One atom

Question 7

Polyatomic

Answer 7

More than one atom

Question 8

Diatomics

Answer 8

Any element that are unstable alone and has to have at least 2 atoms minimum

Question 9

Molecules

Answer 9

Neutral group of bonded atoms. (more than one)

Question 10

Compounds

Answer 10

2 or more different elements chemically combined

Question 11

Mixtures

Answer 11

2 or more different elements chemically combined

Question 12

Homogenous

Answer 12

Of the same kind

Question 13

Heterogenous

Answer 13

(adj.) composed of different kinds, diverse

Question 14

Solutions

Answer 14

mixture of solid completely dissolved in liquid

Question 15

Alloys

Answer 15

homogenous mixtures of two or more metals

Question 16

Suspension

Answer 16

A mixture in which large particles can be seen and easily separated by settling or filtration

Question 17

Colloid

Answer 17

A mixture containing small/medium, undissolved particles that do not settle out.

Question 18

Physical change

Answer 18

A change in a substance that does not involve a change in the identity of the substance (Size, shape, color, or state of matter)

Question 19

Chemical change

Answer 19

A change in matter that produces one or more new substances

Question 20

Decanting

Answer 20

Pouring liquid off the top when sediment has settled to the bottom of the container

Question 21

Centrifuging

Answer 21

Separating a mixture by rotating the container quickly. The heavier parts of the mixture move to the outside of the spinning container.

Question 22

Filtration

Answer 22

A process that separates materials based on the size of their particles.

Question 23

Distillation

Answer 23

A process that separates the substances in a solution based on their boiling points

Question 24

Chromatography

Answer 24

A technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of another material.

Question 25

Evidence of chemical changes

Answer 25

gives off a gas (bubbles), changes color (not always), heat, light, or sound is given off of absorbed, a new solid material forms in liquid, or the change is difficult of impossible to reverse

Question 26

Tyndall Effect

Answer 26

Scattering of a light beam as it passes through a colloid

Question 27

Malleability

Answer 27

the ability of a substance to be hammered or beaten into thin sheets

Question 28

Ductile

Answer 28

A term used to describe a material that can be pulled out into a long wire.

Question 29

Lustrous

Answer 29

Shiny

Question 30

Miscibility

Answer 30

the ability to mix without separating into two states

Question 31

Extensive property

Answer 31

a property that depends on the amount of matter in a sample

Question 32

Intensive property

Answer 32

a property that depends on the type of matter in a sample, not the amount of matter