C4

Question 1

Ion

Answer 1

a charged particle which can be positive or negative

Question 2

ionic bonding

Answer 2

occurs between a metal and non-metal element, where the metal atom loses electrons to a non-metal atom to form ions

Question 3

chemical formula

Answer 3

tells you which atoms and how many of them are present

Question 4

Oxidation

Answer 4

A reaction where oxygen is added

Question 5

reduction

Answer 5

a reaction where oxygen is removed

Question 6

Odisplacement reaction

Answer 6

where a more reactive element displaces a less reactive element from its compound

Question 7

ore

Answer 7

a rock that contains enough of a metal compound in it to be worth extracting

Question 8

native metal

Answer 8

an unreactive metal that is found on its own in the ground

Question 9

3 common acids and its formula

Answer 9

Hydrochloric acid HCL
Sulphuric acid H2SO4
Nitric acid HNO3

Question 10

Acid in terms of electrons

Answer 10

an acid releases H+ ions in solution

Question 11

What’s a base

Answer 11

a metal oxide, hydroxide or carbonate that will react with an acid

Question 12

acid

Answer 12

a substance with a pH less than 7

Question 13

alkilis

Answer 13

a soluble base that has a pH higher than 7

Question 14

neutralisation solution

Answer 14

a solution that has a pH of exactly 7

Question 15

Electrolysis

Answer 15

a separation technique in which a compound is split into its elements using electricity

Question 16

Anode

Answer 16

Positive electrode made from carbon

Question 17

Cathode

Answer 17

Negative electrode made from carbon

Question 18

electrolyte

Answer 18

the substance that is getting split by electricity. Has to be either molten or aqueous solution

Question 19

cryolite

Answer 19

a substance added to a aluminium oxide to lower its melting point

Question 20

which ions are always present in solutions of alkali

Answer 20

Hydroxide ions OH-