Particulate Nature of Matter

Question 1

Particles (atoms, molecules or ions), that are in constant motion, have mass and take up space.

Answer 1

Matter

Question 2

Transformation of matter where mass and energy are conserved

Answer 2

Chemical reaction

Question 3

The smallest unit of matter. Can be combined to form other substances but cannot be broken down chemically.

Answer 3

Element

Question 4

A particle of one element. Can be combined in fixed ratios and have different masses than atoms of another element.

Answer 4

Atom

Question 5

Anything that exists but does not have the properties of matter (ex. the ability to do work)

Answer 5

Energy

Question 6

Elementary substance

Answer 6

contain atoms of a single element

Question 7

Chemical compound

Answer 7

contain atoms of two or more elements

Question 8

Chemical formula

Answer 8

A notation that contains the number of each element in a substance or compound

Question 9

Pure substance

Answer 9

Has definite and uniform chemical composition

Question 10

Mixture

Answer 10

A combination of two or more pure substances that retain their individual properties

Question 11

Homogenous

Answer 11

Has uniform composition and properties throughout

Question 12

Heterogeneous

Answer 12

Has non-uniform composition and varying properties throughout

Question 13

Numerical data, like temperature or mass, that is measured

Answer 13

Quantitative

Question 14

Categorical data, like color, that is observed

Answer 14

Qualitative

Question 15

Change in the appearance or form of the matter

Answer 15

Physical change

Question 16

Changes to the kind of matter and at least one new substance with new properties is formed

Answer 16

Chemical change

Question 17

Separation technique where mixture is poured through a filter

Answer 17

Filtration

Question 18

Separation technique where mixture is added to water or organic solvent

Answer 18

Dissolution

Question 19

Separation technique where mixture is dissolved, cooled and crystals form

Answer 19

Crystalization

Question 20

Separation technique where a mixture is heated until one or more components vaporize

Answer 20

Evaporation or distillation

Question 21

Separation technique where a mixture is placed on a piece of paper and one end is submerged in water. Components move along the paper

Answer 21

Paper chromatography

Question 22

Solid

Answer 22

Fixed volume and shape, cannot be compressed, strong attractive forces between particles, particles vibrate in fixed positions

Question 23

Liquid

Answer 23

fixed volume, no fixed shape, cannot be compressed, weaker attractive forces, particles vibrate, rotate and move

Question 24

Gas

Answer 24

no fixed volume or shape, can be compressed, weakest attractive forces. particles constantly move quickly

Question 25

Sublimation

Answer 25

solid to gas

Question 26

Deposition

Answer 26

gas to solid

Question 27

Vaporization

Answer 27

liquid to gas

Question 28

Condensation

Answer 28

gas to liquid

Question 29

Freezing

Answer 29

liquid to solid

Question 30

Melting

Answer 30

solid to liquid

Question 31

Endothermic process

Answer 31

Energy is absorbed

Question 32

Exothermic process

Answer 32

Energy is released

Question 33

Absolute zero

Answer 33

The temperature at which particles cannot transfer energy or move, 0 K or -273.15 C

Question 34

SI unit for temperature

Answer 34

Kelvin (K)

Question 35

SI unit for length

Answer 35

Meter (m)

Question 36

SI unit for mass

Answer 36

Kilogram (kg)

Question 37

SI unit for time

Answer 37

Second (s)

Question 38

SI unit for amount

Answer 38

Mole (mol)

Question 39

SI unit for electrical current

Answer 39

Ampere (amp)

Question 40

SI unit for light

Answer 40

Candela (cd)

Question 41

Conversion from Celsius to Kelvin

Answer 41

C + 273.15 = K

Question 42

Chemical Equation

Answer 42

Symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formula or symbol.