Name of compound
Chemical formula
Number of each element in the compound
Helium
He
One helium atom
Oxygen
\(O_2\)
2 oxygen atoms
Water
\(H_2O\)
2 hydrogen atoms and 1 oxygen atom
Ammonia
\(NH_3\)
1 nitrogen atom and
3 hydrogen atoms
Sulphuric acid
\(H_2SO_4\)
2 hydrogen atoms, 1 sulphur atom and 4 oxygen atoms
Assess yourself by staged practices