The valency of sodium is _____.
1
2
3
4
Sodium has one electron in outermost orbit and on losing it, sodium attains octet configuration.Thus, the valency of sodium is 1.
Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valency 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4.
Chemical formula of a compound is A2B3. The valency of A is _______ .
Which of the following statement is/are wrong in case of sodium chloride NaCl?