Chemistry

Question 1

Chemistry

Answer 1

the science that deals with the composition and properties of substances and various elementary forms of matter

Question 2

Matter

Answer 2

anything Mass and volume that has mass and takes up space

Question 3

Extensive property

Answer 3

Mass and volume, but hardness

Question 4

Intensive Property

Answer 4

is a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system

Question 5

Mass

Answer 5

amount of matter in an object

Question 6

Volume

Answer 6

a measure of the amount of space occupied by that object

Question 7

Physical Property

Answer 7

color, smell, freezing point, boiling point, melting point, infrared spectrum

Question 8

Physical Change

Answer 8

is a change in which no new substances are formed

Question 9

Chemical Property

Answer 9

is any of a material’s properties that becomes evident during, or after, a chemical reaction

Question 10

Chemical Change

Answer 10

a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance

Question 11

Phase (Phase of Matter)

Answer 11

The states in which matter can exist: as a solid, liquid, or gas

Question 12

Solid

Answer 12

is one of the four common states of matter. The molecules in solids are closely bound together, they can only vibrate

Question 13

Liquid

Answer 13

A phase of matter in which atoms or molecules can move freely while remaining in contact with one another

Question 14

Gas

Answer 14

a substance (such as oxygen or hydrogen) that is like air and has no fixed shape

Question 15

Freezing

Answer 15

to become hardened into ice or into a solid body

Question 16

Melting

Answer 16

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

Question 17

Vaporization

Answer 17

the conversion of a solid or a liquid into a gas

Question 18

Condensation

Answer 18

is the process by which water vapor in the air is changed into liquid water

Question 19

Sublimation

Answer 19

when anything solid turns into a gas without first becoming liquid

Question 20

Deposition

Answer 20

The process by which water, ice, wind, or gravity moves fragments of rock and soil

Question 21

Substance ( Pure Substance )

Answer 21

is matter which has a specific composition and specific properties

Question 22

Element

Answer 22

is composed of atoms that have the same atomic number, that is, each atom has the same number of protons in its nucleus as all other atoms of that element

Question 23

Chemical Symbol

Answer 23

the symbols in the periodic table

Question 24

Compound

Answer 24

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

Question 25

Mixture

Answer 25

is a material made up of two or more different substances which are mixed but are not combined chemically

Question 26

Homogenous Mixture

Answer 26

is simply any mixture that is uniform in composition throughout

Question 27

Solution

Answer 27

A mixture in which particles of one or more substances (the solute) are distributed uniformly throughout another substance (the solvent), so that the mixture is homogeneous at the molecular or ionic level

Question 28

Heterogenous Mixture

Answer 28

A mixture is a combination of two or more pure substances in which the original substances retain their chemical properties

Question 29

Filtration

Answer 29

The act or process of filtering, especially the process of passing a liquid or gas, such as air, through a filter in order to remove solid particle

Question 30

Distillation

Answer 30

The evaporation and subsequent collection of a liquid by condensation as a means of purification

Question 31

Chemical Reaction

Answer 31

A process in which atoms of the same or different elements rearrange themselves to form a new substance

Question 32

Reactant

Answer 32

a substance that enters into and is altered in the course of a chemical reaction

Question 33

Product

Answer 33

he number or expression resulting from the multiplication together of two or more numbers or expressions

Question 34

Precipitate

Answer 34

is an insoluble solid that emerges from a liquid solution

Question 35

Law of Conservation of Mass

Answer 35

states that mass can neither be created nor destroyed in a chemical reaction