Question

Exceptional cases for metals and nonmetals

Answer 1

metals have electron in valanve shell as 1 2 3 except mercury -1
mercury is liquid in room temp.
metals have lusture except lead.
metals r hard excpt - sodium potassium gallium
mp and bp of metals r high excpt mercury

Answer 2

Exceptions are lithium, sodium and potassium. The density of these elements is lower than that of water and hence they do not sink. 4) Most of the non-metals have very low density. Exception is diamond, a form of carbon.22