Give two examples of elements of Groups 1, 2, 16 and 17.
The examples of elements are:
Group 1- Sodium (Na)
Potassium (K)
Group 2- Beryllium (Be)
Magnesium (Mg)
Group 16- Oxygen (O)
Sulphur (S)
Group 17- Fluorine (F)
Chlorine (Cl)