CHEM RVIEWER

Question 1

is the branch of science concerned with the understding of matter

Answer 1

Chemistry

Question 2

is anything that takes up space

is made up of any tiny particles called atoms

Answer 2

Matter

Question 2

contains two or more different substances that are physically mixed but not chemically combined

Answer 2

Mixture

Question 3

have fixed or definite composition

Answer 3

Pure substance

Question 4

is a mixture in which the composition is uniform throughout the mixture

Answer 4

Homogeneous Mixture

Question 4

mixture that is divided into different regions of appearance and properties

Answer 4

Heterogenous mixtures

Question 5

it contains two or more elements

Answer 5

Compound

Question 5

two different types of changes (changes in matter)

Answer 5

Physical and Chemical

Question 5

has no definite shape

has definite volume

Particles are free to move over each other, but are still attracted to each other.

Answer 5

Liquid

Question 6

a matter that has a defined shape

particles are close together in a fixed arrangement

particles move slowly

Answer 6

Solid

Question 6

is the state of matter that has no definite shape or volume.

Answer 6

Gas

Question 7

is when matter becomes something completely new. New matter is formed

Answer 7

Chemical change

Question 7

is when matter changes its property but not its chemical nature

Answer 7

Physical Change

Question 8

is the smallest unit of matter.

Answer 8

Atoms

Question 9

negatively charged subatomic particle that can be either bound to an atom or free (not bound).

Answer 9

Electrons

Question 9

a subatomic particle with a positive electrical charge

Answer 9

Protons

Question 10

are neutral subatomic particles that form the nucleus of an atom. They have neutral charges

Answer 10

Neutrons

Question 10

is the central core of an atom

Answer 10

Nucleus

Question 11

number of protons in an atom of a particular element

Answer 11

Atomic number