Science Chem. Unit

Front 1

proton

Back 1

positive charge ion

Front 2

electron

Back 2

negitive charge ion

Front 3

neutron

Back 3

neutral charge ion

Front 4

co-efficient

Back 4

the number of that element

Front 5

molecule

Back 5

how many of that element is being used

Front 6

atom

Back 6

the smallest part of an element

Front 7

compound

Back 7

two elements to form one chemical

Front 8

valence electron

Back 8

electron in the outermost energy level of an atom

Front 9

bond

Back 9

when atoms are shared between elements

Front 10

polar covalent bond

Back 10

electrons are shared unequally between two atoms

Front 11

non-polar covalent bond

Back 11

electrons are shared equally between two atoms

Front 12

ionic bond

Back 12

bonding that involves the transfer of electrons

Front 13

period (periodic table)

Back 13

the line of elements going across the periodic table

Front 14

group (periodic table)

Back 14

what an element belongs to

Front 15

metals (periodic table)

Back 15

good conductors of heat

Front 16

non-metals (periodic table)

Back 16

dull, poor conductors, clank, liquids , not magnetic

Front 17

alkali metals (periodic table)

Back 17

most reactive, low melting point

Front 18

halogens (periodic table)

Back 18

elements in the 17th group

Front 19

nobel gases (periodic table)

Back 19

8 electrons except helieum

Front 20

law of conservation of mass

Back 20

matter cannot be created nor distroyed

Front 21

chemical equation

Back 21

the discription of an element using symbols to represent elements

Front 22

reactant

Back 22

substances that enters into a chemical reaction

Front 23

product

Back 23

substance produced by a chemical reaction

Front 24

synthesis reaction

Back 24

chemical reaction where two or more simpel substances combine to make new, more complex substances

Front 25

double replacement reaction

Back 25

chemical reaction where different atoms in two different compounds replace eachother

Front 26

decomposition reaction

Back 26

chemical reaction where a complex substance breaks down into 2 or more simplier substances

Front 27

endothermic reaction

Back 27

chemical reaction in which energy is absorbed

Front 28

exothermic reaction

Back 28

chemical reaction in which energy is released

Front 29

activation energy

Back 29

energy required for a chemical reaction to occure

Front 30

kinetics

Back 30

study of the rates of chemical reactions

Front 31

reaction rate

Back 31

measure of how quickly reactants change into products

Front 32

collision theory

Back 32

theory that relates collision among particles to reaction rate

Front 33

catalyst

Back 33

substance that increases the rate of a chemical reaction without being changed by a reactant

Front 34

concentration

Back 34

amount of a solute disolves in a certian amound of solvent

Front 35

pH

Back 35

measure of the hydronium ion concentratrion of a solution; measured on a scale from 0 to 14

Front 36

acids

Back 36

compounds that has a pH below 7

Front 37

bases

Back 37

compound that has a pH level above 7

Front 38

solute

Back 38

the disolver

Front 39

solvent

Back 39

the thing being disolved

Front 40

solution

Back 40

mixture where one substance is disolved/ broken down in another substance

Front 41

solubility

Back 41

measures how much of a solute can be disolved in a given amount of solvent under certain conditions