unit 2

Question 1

Chemistry

Answer 1

the science that deals with the properties of substances & various of elementary forms of matter.

Question 2

Matter

Answer 2

the substances of which any physical object consists or is composed

Question 3

Extensive Properties

Answer 3

a property of matter that changes the amount of matter changes

Question 4

Intensive Properties

Answer 4

a property of matter that does not change as the amount of matter changes.

Question 5

Mass

Answer 5

measure of the amount of the matter in a object

Question 6

Volume

Answer 6

the quantity of three- dimensional space occupied by a liquid, solid, or gas.

Question 7

Physical Property

Answer 7

a characteristic of matter that may be observed and measured without changing the chemical identity of a sample

Question 8

Physical Change

Answer 8

a type of change in which the form of matter is altered but one substance is not transformed into another

Question 9

Chemical Property

Answer 9

a characteristic or behavior of a substance that may be observed when it undergoes a chemical change or reaction.

Question 10

Chemical Change

Answer 10

a process where one or more substances are altered into one or more new and different substances

Question 11

Phase (Phase of matter)

Answer 11

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

Question 12

Solid

Answer 12

a state of matter characterized by particles arranged such that their shape and volume are relatively stable

Question 13

Liquid

Answer 13

is one of the states of matter. consists of atoms or molecules that are connected by intermolecular bonds.

Question 14

Gas

Answer 14

a s​tate of matter consisting of particles that have neither a defined volume nor defined shape

Question 15

Freezing

Answer 15

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

Question 16

Melting

Answer 16

the process by which a substance changes from the solid phase to the liquid phase.

Question 17

Vaporization

Answer 17

phase transition from the liquid phase to gas phase.

Question 18

Condensation

Answer 18

state of matter change from vapor phase to liquid phase.

Question 19

Sublimation

Answer 19

phase transition from solid phase directly to vapor phase.

Question 20

Deposition

Answer 20

settling of sediment or particles onto a surface or the phase change from the vapor to solid phase.

Question 21

Substance

Answer 21

a particular kind of matter with uniform properties

Question 22

Element

Answer 22

a substance that cannot be subdivided using chemical means; identified by the number of protons in its atoms.

Question 23

Chemical Symbol

Answer 23

one- or two-letter representation of a chemical element (e.g., H, Al).

Question 24

Compound

Answer 24

chemical species formed when two or more atoms form a chemical bond.

Question 25

Mixture

Answer 25

combination of two or more substances such that each retains its separate chemical identity

Question 26

Homogeneous MIxture

Answer 26

uniform through its volume.

Question 27

Solution

Answer 27

homogeneous mixture of two or more substances.

Question 28

Heterogeneous MIxture

Answer 28

a mixture that lacks a uniform composition such that at least two components are present with identifiable properties.

Question 29

Filtration

Answer 29

the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium

Question 30

Distillation

Answer 30

technique of heating a liquid to form a vapor, which is cooled to separate components of the liquid based on volatility or boilings.

Question 31

Chemical Reaction

Answer 31

a chemical change in which reactants form one or more new products.

Question 32

reactant

Answer 32

starting material for a chemical reaction.

Question 33

Product

Answer 33

substance formed as a result of a chemical reaction.

Question 34

Precipitate

Answer 34

to form an insoluble compound by reacting salts or altering a compound’s solubility.

Question 35

Law of Conservation of Mass

Answer 35

law that states matter in a closed system may be neither created nor destroyed, although it may change forms.