10 questions🇬🇧English
⚛️ Elements, Compounds & Mixtures – Year 8
Chemistry · Year 8 (KS3) — practise telling elements, compounds and mixtures apart using symbols, formulae and diagrams
Make it your own private quiz and change anything you like
Questions
Which of these is the correct definition of an element?
A substance made of two or more types of atom
A substance made of only one type of atom
A substance that always contains oxygen atoms
Two substances mixed but not chemically joined
20s
What is the chemical symbol for sodium?
Na
S
So
Sd
20s
Which of these substances is a mixture?
Air
Iron
Water
Carbon dioxide
20s
Which of these formulae represents a compound?
CO₂
O₂
Fe
N₂
20s
Magnesium burns in oxygen to form a compound containing only these two elements. What is it called?
Magnesium dioxide
Magnesium oxide
Oxygen magneside
Magnesium oxate
30s
A particle diagram shows only identical pairs of atoms joined together, all of the same type. What does it show?
A mixture of two elements
A compound made of molecules
A mixture of two compounds
An element made of molecules
30s
Which method is used to get solid salt back from salty water?
Filtration
Sieving
Chromatography
Evaporation
20s
Which elements are found in copper sulfate?
Copper, sulfur and oxygen
Copper, sodium and oxygen
Copper and sulfur only
Copper, sulfur and hydrogen
30s
A mixture of iron filings and sulfur is heated until it forms iron sulfide. Which statement is true?
The iron can no longer be removed with a magnet
The iron sulfide can be separated by filtering
The iron and sulfur keep their own properties
No new substance has been formed
30s
How many atoms in total are shown in the formula CaCO₃?
4
5
3
6
30s