unit 2

Question 1

solid

Answer 1

definite shape and volume, not compressible, vibrating fixed particles

Question 2

liquid

Answer 2

indefinte shape, definite liquid, slightly compressable, particles slide

Question 3

gas

Answer 3

indefinite shape and volume, very compressible, particles move fast

Question 4

pure substance

Answer 4

every sample is the same composition (element or compound)

Question 5

law of definite proportions

Answer 5

compounds are fixed ratio (water is always H2O 2:1)

Question 6

law of multiple proportions

Answer 6

same element can be combined in different ways to make it new (H20 2:1 is water, H2O2 2:2 hydrogen peroxide)

Question 7

chemical separation

Answer 7

electrolysis

Question 8

mixture

Answer 8

physical blend with 2 or more substance

Question 9

heterogeneous

Answer 9

mixture is not the same throughout ( salad)

Question 10

homogeneous

Answer 10

mixture with same composition throughout (salt water)

Question 11

solute

Answer 11

substance that gets dissolved (what u have the least of)

Question 12

solvent

Answer 12

substance that does the dissolving ( what u have more of)

Question 13

physical seperation

Answer 13

distilation(boiling) filtration(particle size) chromatography (polarity)
magnetism (magnetic)
settling (gravity)

Question 14

solution (mixture)

Answer 14

small particles, no scattering of light, no separation from gravity, ex salt water

Question 15

colloid ( mixture)

Answer 15

medium particle size, tyndall effect, no sep from gravity, borderline homo/hetero, ex whole milk

Question 16

suspension ( mixture)

Answer 16

large particles, slight tyndal effect, sediment forms from gravity, heterogenous ex muddy water

Question 17

tyndall effect

Answer 17

scattering of light

Question 18

diatomic elements

Answer 18

do not normally exsist as a single atom ( oxygen is 2O)

Question 19

deposition

Answer 19

gas to solid (less energy

Question 20

sublimation

Answer 20

solid to gas (more energy

Question 21

vaporization

Answer 21

water to gas ( more energy

Question 22

freezing

Answer 22

liquid to solid ( less energy

Question 23

melting

Answer 23

solid to liquid ( more energy

Question 24

condensation

Answer 24

gas to liquid ( less energy

Question 25

chemical change

Answer 25

oder, fire, temp change, color change, precipitation, gas

Question 26

density

Answer 26

intensive