1
Q
Give 5 features of metals
A
They are strong They are malleable They are shiny They are not bendy They have high melting points
2
Q
What is an alloy
A
It is a substance which has been formed by combining two or more metallic elements
3
Q
What do people make alloys
A
Because they are stronger and last longer
4
Q
How can you predict how reactive a metal is
A
By reacting them with water, an acid or oxygen
5
Q
What are the products from an acid + metal
A
A salt + hydrogen
6
Q
Acid + metal carbonate -
A
A salt +carbon dioxide + water
7
Q
Acid +metal oxide -
A
A salt + water
8
Q
What are the diatomic molecules
A
Hydrogen Nitrogen Fluorine Oxygen Iodine Chlorine Bromine
9
Q
What does an acid always have in its formula
A
Hydrogen
10
Q
What does diatomic mean
A
It means the atoms travel around in pairs
11
Q
How do we know if a chemical reaction has taken place?
A
There could be: Colour change Temperature change New product formed Change in mass
Year 8 science
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