1
Q
Metals are good…
A
Electrical and heat conductors
2
Q
Give three characteristics of non-metals
A
Lightweight, less dense, inulatators
3
Q
When 2 or more elements are chemically bonded together, what do they form?
A
A compound
4
Q
H20 has how many elements?
A
2
5
Q
H20 has how many atoms?
A
3
6
Q
When 2 different elements combine it usually ends in…
A
Ide
7
Q
When 3 or more elements combine it usually ends in…
A
Ate
8
Q
5 signs of a chemical reaction
A
Change in state
Change in colour
Irreversible
Temperature change
Gas is emitted
9
Q
What is an alloy?
A
A mixture of 2 different metals
10
Q
What is a pure substance?
A
Something only made up of 1 element or compound.
Science yr8
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