Science 7 - Chemistry Ch. 3 & 4 Quiz

Front 1

Mixture

Back 1

- matter that consists of 2/more substances mixed but NOT chemically combined

1. can be found in diff amounts
2. can be separated
3. substances retain their properties

Front 2

Heterogeneous

Back 2

- substance that DOES NOT apper the same throughout
aka least mixed
ex. cement

Front 3

Homogeneous

Back 3

- mixture that does appear the same throughout
aka well mixed
ex. lotion

Front 4

Colloid

Back 4

- type of homogenous mixture in which particles are mixed but NOT DISSOLVED
ex. clouds,smoke,paint,butter,mayo

Front 5

Solution

Back 5

- homogenous mixture in which one substance is dissolved in another
aka best mixed
ex. air,iced tea,ocean water

Front 6

Solute

Back 6

- substance dissolved in the solution

Front 7

Solvent

Back 7

- substance that does the dissolving in a solution

Front 8

Soluble

Back 8

- ABLE to be dissolved (in water)
ex. sugar is soluble in water

Front 9

Insoluble

Back 9

- UNABLE to be dissolved (in water)
ex. rocks are insoluble in water

Front 10

Solubility

Back 10

- amount of a solute that can be completely dissolved in a given amount of solvent at a specific temp

Front 11

Alloy

Back 11

- a sloution of 2/more metals / a metal & nonmetal that has the properties of a metal
ex. gold

Front 12

Pure Substance

Back 12

- substance made of only 1 kind of material & has definite properties
- same throughout/doesn't vary from place to place

Front 13

Element

Back 13

- simplest type of a pure substance
ex. Lithium,Iodine,Gold

Front 14

Atom

Back 14

- smallest particle of an element that has all the properties of that element
ex. one atom of iron
- atoms are the building blocks of matter

Front 15

Atoms are represented by ...

Back 15

- chemical symbols
ex. Copper(Cu) Carbon(C)

Front 16

Compounds

Back 16

- substances in which 2/more mixtures are chemically combined; can also be pure substances
1. seperated by chemical processes
2. found in a specific amount
ex. 2H + 1O = water molecule
3. usually becomes new substance w/different properties

Front 17

Most compounds are made of...

Back 17

- molecules

Front 18

Molecules

Back 18

- substance made up of 2/more substances chemically combined
- smallest particle of a compound that has all the properties of that compound

Front 19

Chemical Formula

Back 19

- combination of chemical symbols used to represent a compound

Front 20

Chemical Equation

Back 20

- symbolic way to show a chemical reaction

Front 21

Proton

Back 21

- large
- positive charge
- inside nucleus

Front 22

Neutron

Back 22

- large
- neutral
- inside nucleus

Front 23

Electron

Back 23

- small
- no one is sure where it is
- negative charge
- circling around nucleus in the energy levels

Front 24

Atomic Mass

Back 24

# of protons + # of neutrons

Front 25

Atomic Number

Back 25

= # of protons
= # of electrons

Front 26

3 Differences Between Compounds and Mixtures

Back 26

1)mixtures can be found in different amounts
compounds cannot
2) mixtures can be separated
compounds cannot
3) in mixtures substances retain their properties
compounds usually become new subsstance w/diff properties