Review 2

Question 1

Chemical formula

Answer 1

H2o co2

Question 2

Mixture

Answer 2

2 or more substances mixed not chemically combined keep own properties

Question 3

Energy transformation

Answer 3

Change in form electromagnetic to chemical

Question 4

Subscript

Answer 4

Tells you how many atoms or ions in a compound

Question 5

Determines chemical properties of each family

Answer 5

Valence electrons

Question 6

Ionic bond

Answer 6

Bond between oppositely charged ions usually metal or nonmetal

Question 7

Covalent bond

Answer 7

Bond between 2 atoms that share electrons

Question 8

Malleable

Answer 8

Metals that can be rolled into sheets

Question 9

Alloy

Answer 9

Mixture made of two or more metals brass and copper

Question 10

Ductile

Answer 10

Substance can pulled into thin wires

Question 11

Double replacement

Answer 11

2 compounds switch one element in reaction

Question 12

Balanced equation

Answer 12

Same number of each element on each side of the equation

Question 13

Chemical equation

Answer 13

Short way to show a chemical reaction

Question 14

Reactants

Answer 14

Substances on the left of chemical equation

Question 15

Conservation of mass

Answer 15

Matter is not created or destroyed

Question 16

Activation energy

Answer 16

Minimum amount of energy needed to start reaction

Question 17

Coefficient

Answer 17

Number of molecules or atoms of each substance in a reaction

Question 18

Catalyst speeds up reaction by lower activation energy

Answer 18

Speeds up