On moving down in a particular group of modern periodic table the number of valence electrons in the elements______.

State whether the following statement is true or false :

On going down in a group of the periodic table, the number of valence electrons increases.

Which one of the following does not increase while moving down the group of the periodic table?

(a) atomic radius (b) metallic character (c) valence electrons (d) shells in the atoms

If an element is in group 15 of a modern periodic table then the number of valence electrons it has is