Unit 1

Question 1

Signs of a chemical reaction

Answer 1

Colour 
Temp 
Change of state 
Precipitation 
Bubbles

Question 2

Affects rate of chemical reaction

Answer 2

Concentration
Catalyst
Pressure
Temperate

Question 3

Exothermic

Answer 3

Hot

Question 4

Endothermic

Answer 4

Cold

Question 5

Low mp/bp
Never conducts
Eg hydrogen

Answer 5

Covalent molecular

Question 6

High mp/bp
Never conducts
Eg diamond

Answer 6

Covalent network

Question 7

Variable mp/bp

Conducts ad solid or liquid

Answer 7

Metallic

Question 8

High mp/bp
Only conducts in solution
Eg sodium chloride

Answer 8

Ionic lattice

Question 9

Acid + metal

Answer 9

Hydrogen + salt

Question 10

Acid + metal hydroxide

Answer 10

Salt + water

Question 11

Acid + metal oxide

Answer 11

Salt + water

Question 12

Acid + metal carbonate

Answer 12

Salt + water + co2

Question 13

Same protons

Different neutrons

Answer 13

Isotopes

Question 14

Alkali metals

Answer 14

Group 1

Question 15

Halogens

Answer 15

Group 7

Question 16

Noble gases

Answer 16

Group 8/0

Question 17

Who invented the periodic table

Answer 17

Dimitri Mendaleya

Question 18

Ion

Answer 18

Metal lost electrons

Question 19

Anion

Answer 19

Non metal gained electrons

Question 20

Element

Answer 20

I type of atom

Question 21

Molecule

Answer 21

2 or more atoms

Question 22

Compound

Answer 22

2 or more types of atoms

Question 23

Metal and non metal

Answer 23

Ionic

Question 24

Covalent

Answer 24

2 or more non metals
Electrons shared
Low mp
Doesn’t conduct

Question 25

All acids contain

Answer 25

Hydrogen ions