Question

Tin and lead have four electrons in their valence shells. Metals have 1, 2 or 3 electrons in their valence shells. So, what's the reason of tin and lead metals having more than three electrons in their valence shell?

Answer 1

Metals have tendency to loose electrons.Tin and lead with 4 electrons in their valence shell act as metal. Due to the larger size , low ionization energy and low electronegativity they loose their electrons easily.