How many electrons does oxygen have?
8
16
14
4
How many electrons are in the outer shell of Magnesium (Mg)?
1
2
A compound is two or more atoms that have a chemical bond. It is usually hard to separate them once this bond has been formed.
Atoms are lost in chemical reactions.
Limestone can be used for many different things. Tick all the boxes, limestone is not used to make.
Buildings
Glass
Water bottles
Computers
Pavements
Making things from limestone causes pollution?
Nearly all of the elements on the periodic table are non-metals.
What is commonly used to extract Iron from it's ore?
Blast Furnace
Electrolysis
A hot catalyst
What method is used to separate crude oil into different substances?
Fractional Distillation
kerosene is used to make which product?
Jet fuel
Car fuel
Train fuel
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