keywords

Question 1

periodic table

Answer 1

list of all known elements grouped wiht those of similar properties

Question 2

element

Answer 2

an element is a pure substance consisting of only 1 atom

Question 3

compound

Answer 3

when 2 or more different elements chemicaly combine or join together to form a new substance

Question 4

atom

Answer 4

smallest unit of ordinary matter

Question 5

alkali

Answer 5

a bisic soluble hydroxide of alkali matals or alkaline earth metals
has a pH of 8-14

Question 6

neutralisation

Answer 6

is a reaction where an acid reacts with an alkali to fomr a nuetral solution of salt and water

Question 7

salt

Answer 7

chemical compound formed from the reaction of an acid with a base

Question 8

solute

Answer 8

solution that dissolves to make a solution eg-salt

Question 9

solvent

Answer 9

the substance that does the dissolving eg-water

Question 10

solution

Answer 10

a solute + solvent produce a solution eg-sea water

Question 11

alkali metals

Answer 11

the group 1 metals in the periodic table are known as the alkali metals
they include lithium, sodium and potassium, which all react with water
the reactivity increases as you go down the group

Question 12

reactivity series

Answer 12

the order of reactivity of a group of elements

Question 13

displacement

Answer 13

more reactive element will displace/push out a less reactive element from a compound and replace it
eg-magnesium + copper sulfate – copper + magnesium sulfate

Question 14

oxidation

Answer 14

metals react with oxygen in the air to produce metal oxides eg- magnesium + oxygen – magnesium oxide

Question 15

what are metal oxides?

Answer 15

they are bases that react with acids and neutralise them