Unit 2

Question 1

Law of Conservation of Matter

Answer 1

Matter can’t be created or destroyed.

Question 2

Law of Definite(Multiple) Proportions

Answer 2

Relative numbers and atoms are constant.

Question 3

Family(Group)

Answer 3

Vertical

Question 4

Period

Answer 4

Horizontal

Question 5

Black Symbols

Answer 5

Solid at room temperature

Question 6

Reds Symbols

Answer 6

Gas at room temperature

Question 7

Blue Symbols

Answer 7

Liquid at room temperature

Question 8

White symbols

Answer 8

Man-Made chemicals

Question 9

Diatomic Molecules

Answer 9

Elements that can’t exist by themselves in nature. (Br, I, N, Cl, H, O, and F)

Question 10

Metals

Answer 10

Left of the staircase. When metals have a charge they are called cations. Forms positive ions because it gives away electrons.

Question 11

NonMetals

Answer 11

Right of the staircase. When they have a charge they are called anions. forms negative ions because it gains electrons.

Question 12

Metalloids

Answer 12

On the staircase line. Have both metal and nonmetal characteristics. (B, Si, Ge, As, Sb, Te, Po)

Question 13

Mixture

Answer 13

Combination of one or more pure substances.

Question 14

Chemical Property

Answer 14

The ability of a substance to undergo a change that transforms it to a different substance.

Question 15

Physical Property

Answer 15

Characteristics of a substance that can be observed or measured without changing the composition.

Question 16

Viscosity

Answer 16

The resistance of a fluid to flow

Question 17

Buoyancy

Answer 17

The force with which a more dense fluid pushes a less dense substances upward.

Question 18

Kinetic Theroy

Answer 18

All matter is composed of small particles and these particles are in constant motion, colliding with each other and the walls of their containers.

Question 19

Absolute Zero

Answer 19

Theoretically all molecular motions stops at -273.15

Question 20

Endothermic

Answer 20

Taking in energy

Question 21

Exothermic

Answer 21

Release of energy

Question 22

Calorimetry

Answer 22

The accurate and precise measurement of heat change fore chemical and physical processes.

Question 23

Calorimeter

Answer 23

Insulated device used to measure the absorption or release of heat in chemical or physical processes.

Question 24

Plasma

Answer 24

Matter that contains both negative and positive charged particles that are overall neutral.

Question 25

Sublimation

Answer 25

Going straight from a solid to a gas and is an endothermic process

Question 26

Vaporization

Answer 26

Energy has to be supplied to a liquid to enable it to overcome forces that hold molecules together and is an exothermic process

Question 27

Melting

Answer 27

Energy is supplied to a solid to enable it to vibrate more vigorously until molecules can move past each other and flow as a liquid.

Question 28

Freezing

Answer 28

Liquid releases energy and allows molecules to settle into a lower energy state and form a solid and is an exothermic process.

Question 29

Specific Heat

Answer 29

The quantity of energy required to change the temperature of a 1g sample of something1degrees Celcius

Question 30

Homogenous Mixture

Answer 30

A substance that is the same throughout/looks all the same. Ex: air, salt water, etc.

Question 31

Heterogenous Mixture

Answer 31

A substance where you can see the different parts/looks different throughout. Ex: OJ with pulp, dirt, cookie dough ice cream, etc.

Question 32

Substance

Answer 32

Matter that is either an element or a compound.

Question 33

Extensive Physical Property

Answer 33

Depends on the amount of a sample. Ex: mass, volume, or weight.