The valency of neon is

The valency of hydrogen is 1, magnesium, 2 aluminium 3 and carbon 4 . Can you see any connection between the valency of an element and the number of electrons it has in its outermost electron shell ? What would you predict the valencies of helium (He), phosphorus (P), sulphur (S) and neon (Ne) to be ?

The density of neon will be minimum at

The density of neon will be highest at

The density of neon gas will be highest at

The density of neon gas will be highest at