1.
breakdown of a chemical
2.
speeds up the rate of reaction
3.
a reaction that gives out heat
4.
a more reactive metal takes the place of a less reactive metal
5.
a chemical that takes part in a reaction
6.
a chemical made by a reaction
7.
the letters that show which elements are in a chemical
8.
break down slowly by chemical reaction
9.
coat with zinc to prevent corrosion of iron
11.
remove oxygen by chemical reaction
12.
add oxygen to one chemical by taking it away from another
13.
the common name for iron oxide
14.
the chemical name for rust
15.
the element making up 20% of the atmosphere
16.
how to work out which gas has been produced
17.
reacts with a squeaky pop with a lit splint
18.
made up of only one type of atom
19.
2 or more elements chemically bonded together
20.
reacts with metals to release hydrogen
21.
gases form these in liquids
22.
a sign of a chemical reaction
23.
the order of elements according to how they interact with others
