Question

Co-ordination number of sodium ion Na⁺ in Nacl is:-

Options

• Four

• Three

• Six

• five

Answer 1

Six

Explanation:

For sodium chloride, Na⁺cl^–, there are 6 anions around each cation (Coordination number Na = 6), because of the 1 : 1 stoichiometry there must 'also be 6Na cations around each Cl anion.