Chemistry

Question 1

Matter

Answer 1

Anything that has mass and takes up space (volume)

Question 2

Mass

Answer 2

The amount of matter an object has

Question 3

Physical property

Answer 3

Quality of condition of a substance that can be observed or measured without changing the substance’s composition

Question 4

Solid

Answer 4

Matter that has a definite shape and volume. Almost incompressible.

Question 5

Liquid

Answer 5

A form of matter that flows, has a fixe3d volume, and takes the shape of its container. Almost incompressible but they expand when heated.

Question 6

Gas

Answer 6

A form of matter that takes both the shape and volume of its container

Question 7

Vapor

Answer 7

The gaseous state of a substance that is generally a liquid or solid at room temperature

Question 8

Physical Change

Answer 8

A change that alters a given material without changing its composition.

Question 9

Mixture

Answer 9

A physical blend of two or more substances

Question 10

Heterogeneous mixture

Answer 10

A mixture that is not uniform in composition.

Question 11

Homogeneous Mixture

Answer 11

A mixture that has a completely uniform composition.

Question 12

Solutions

Answer 12

Gases, solids, or liquids that are homogeneous mixtures.

Question 13

Phase

Answer 13

Any part of a system with uniform composition and properties.

Question 14

Distillation

Answer 14

A liquid is boiled to produce a vapor that is then condensed again to a liquid.

Question 15

Elements

Answer 15

The simplest forms of matter that can exist under normal laboratory conditions. They cannot be separated into simpler substances by chemical means.

Question 16

Compounds

Answer 16

Substances that can be separated into simpler substances only by chemical means.

Question 17

Chemical Symbol

Answer 17

One or two letters that represent an element.

Question 18

Chemical Reaction

Answer 18

A change where one or more substances change into new substances.

Question 19

Reactants

Answer 19

The starting substances.

Question 20

Products

Answer 20

The substances formed.

Question 21

Chemical Property

Answer 21

The ability of a substance to undergo a chemical reaction and to form new substances. Burn, rot, rust, decompose, ferment, explode, and corrode.

Question 22

Law of Conservation of Mass

Answer 22

In any physical change or chemical reactoin, mass is neither created nor destroyed; it is conserved.

Question 23

freezing

Answer 23

a liquid becoming a solid due to a loss of energy; also known as solidifying

Question 24

melting

Answer 24

a solid becoming a liquid due to an increase of energy

Question 25

condensation

Answer 25

a gas becoming a liquid due to a decrease in energy

Question 26

vaporization

Answer 26

a liquid becoming a gas due to an increase of energy; could be evaporation or boiling

Question 27

ionization

Answer 27

a gas becoming electrically charged plasma due to an increase in energy

Question 28

recombination

Answer 28

a plasma becoming a non-charged gas due to a loss of energy; also called deionization

Question 29

sublimation

Answer 29

a change of state from a solid to a gas, bypassing the liquid state, due to an increase of energy; example: dry ice

Question 30

deposition

Answer 30

a change of state from a gas to a solid, bypassing the liquid state, due to a loss of energy; example: snow or frost

Question 31

Ions

Answer 31

atoms with positive and negative chart

Question 32

How many elements is periodic table made up of?

Answer 32

118 elements

Question 33

Nucleus

Answer 33

contains protons

Question 34

proton

Answer 34

a positively charged atomic molecule

Question 35

neutron

Answer 35

an atomic particle with no electric charge

Question 36

electron

Answer 36

a negatively charged atomic particle

Question 37

isotopes

Answer 37

atoms of the same element that have different numbers of neutrons but the same numbers of protons and electrons

Question 38

atomic mass

Answer 38

the sums of the masses of protons and neutrons in one atom of an element

Question 39

nonmetal

Answer 39

any element or substance that is not normal

Question 40

metal

Answer 40

a substance that is a good conductor of electricity and heat, forms cations by loss of electrons, and yields basic oxides and hydroxides

Question 41

anion

Answer 41

a negatively charged ion

Question 42

cation

Answer 42

a positively charged ion

Question 43

ionic bond

Answer 43

the bond between two oppositely charged ions

Question 44

compound

Answer 44

a substance made of two or more elements

Question 45

covalent bond

Answer 45

a chemical bond in which electron pairs are shared between atoms