A student adds small pieces of four metals to dilute hydrochloric acid and to water.
Table: metal A reacts vigorously with acid and slowly with water; metal B reacts slowly with acid and not with water; metal C does not react with either; metal D reacts vigorously with water.
Metal
With dilute acid
With water
A
Vigorous fizzing
Slow bubbles
B
Slow bubbles
No reaction
C
No reaction
No reaction
D
Too dangerous to try
Vigorous fizzing, melts
.1
Use the results to put the metals in order of reactivity, most reactive first.
[1 mark]
.2
Which metal could be copper?
[1 mark]
.3
Complete the word equation: magnesium + hydrochloric acid → magnesium chloride + ______
[1 mark]
4 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Relative atomic masses (Ar): H = 1, C = 12, O = 16, Mg = 24, Cl = 35.5
.1
Calculate the relative formula mass (Mr) of water, H2O.
[1 mark]
.2
Calculate the Mr of carbon dioxide, CO2.
[1 mark]
.3
Calculate the Mr of magnesium chloride, MgCl2.
[2 marks]
3 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Carbon has two common isotopes: carbon-12 and carbon-14. The atomic number of carbon is 6.
.1
Define the term isotopes.
[1 mark]
.2
Give the number of neutrons in an atom of carbon-14.
[1 mark]
.3
Which statement about carbon-12 and carbon-14 is correct?
[1 mark]
4 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Pure aluminium is soft. Aircraft bodies are made from aluminium alloys.
.1
Explain why pure aluminium is soft.
[2 marks]
.2
Explain why aluminium alloys are harder than pure aluminium.
[2 marks]
4 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Magnesium reacts with oxygen to form magnesium oxide, an ionic compound.
The electron structure of magnesium is 2,8,2 and of oxygen is 2,6.
.1
Describe what happens to the electrons when magnesium reacts with oxygen.
[2 marks]
.2
What are the charges on the ions in magnesium oxide?
[1 mark]
.3
Name the type of force that holds the ions together.
