Question

State the number of elements in period 1 period 2 and period 3 of the periodic table

Answer 1

• Period 1 contains two elements that are hydrogen and helium.
• Period 2 contains 8 elements they are lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon
• period 3 have 8 elements i.e Sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine and argon.