Chemistry: Unit 2

Question 1

Chemistry

Answer 1

the branch of science that deals with the identification of the substances of which matter is composed the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

Question 2

Matter

Answer 2

is everything around u like atoms

Question 3

extensive properties

Answer 3

is mass and volume

Question 4

intensive properties

Answer 4

density and color

Question 5

mass

Answer 5

is the measure of the amount of matter in a object

Question 6

volume

Answer 6

is a three dimensional space occupied by a liquid, solid,or gas

Question 7

physical property

Answer 7

can be observed or measured without changing the composition of matter

Question 8

physical change

Answer 8

affecting the form of a chemical substance

Question 9

chemical property

Answer 9

is any of the materials properties

Question 10

chemical change

Answer 10

when a substance combines

Question 11

phase

Answer 11

s a physically distinctive form of matter, such as a solid, liquid, gas or plasma.

Question 12

solid

Answer 12

firm and stable in shape; not liquid or fluid.

Question 13

liquid

Answer 13

a substance that flows freely but is of constant volume, having a consistency like that of water or oil.

Question 14

gas

Answer 14

are more widely spaced than in solids or liquids and suffer only occasional collisions with one another.

Question 15

freezing

Answer 15

The process through which a substance changes from a liquid to a solid.

Question 16

melting

Answer 16

is a physical process that results in the phase transition of a substance from a solid to a liquid

Question 17

vaporization

Answer 17

of an element or compound is a phase transition from the liquid phase to vapor.

Question 18

Condensation

Answer 18

is the process of a substance in a gaseous state transforming into a liquid state

Question 19

sublimation

Answer 19

is the phase transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

Question 20

Deposition

Answer 20

s a process where a gas changes phase and turns directly in solid without passing through the liquid phase

Question 21

Substance

Answer 21

is matter which has a specific composition and specific properties.

Question 22

Element

Answer 22

each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter

Question 23

Chemical Symbol

Answer 23

a code for chemical

Question 24

Compound

Answer 24

s a substance formed when two or more chemical elements are chemically bonded together.

Question 25

Mixture

Answer 25

a substance made by mixing other substances together.

Question 26

homogeneous mixture

Answer 26

has the same uniform appearance and composition throughout

Question 27

solution

Answer 27

a liquid mixture in which the minor component

Question 28

Heterogeneous Mixture

Answer 28

that composes of components that aren’t uniform or they have localized regions that all have different properties

Question 29

Filtration

Answer 29

is any of various mechanical, physical or biological operations that separate solids from fluids by adding a medium through which only the fluid can pass.

Question 30

Distillation

Answer 30

the action of purifying a liquid by a process of heating and cooling.

Question 31

Chemical Reaction

Answer 31

are called reactants or reagents.

Question 32

Reactant

Answer 32

a substance that takes part in and undergoes change during a reaction.

Question 33

Product

Answer 33

are formed from chemical reactions

Question 34

Precipitate

Answer 34

typically one that is bad or undesirable to happen suddenly, unexpectedly, or prematurely.

Question 35

Law of Conservation of Mass

Answer 35

states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.