(a(i))[1]
Give the symbol for the element present in brass.
(a(ii))[1]
Give the symbol of the element that gives an orange-red colour in a flame test.
(a(iii))[1]
Give the symbol of the element that acts as a reactant in a fuel cell.
(a(iv))[1]
Give the symbol of the element whose atom has only three occupied electron shells.
(a(v))[1]
Give the symbol of the element that makes an ion giving a red-brown precipitate when aqueous ammonia is added.
(a(vi))[1]
Give the symbol of the element that forms an ion carrying a $1-$ charge.
(b)[2]
Explain why Li, K and Rb show similar chemical properties.