What is/are valencies of Mercury?
1
2
3
4
Mercury shows multiple valencies. Mercury forms Mercurous and Mercuric compounds with 1 and 2 valencies respectively.
(a) What are valence electrons? Where are valence electrons situated in an atom ?
(b) What is the number of valence electrons in the atoms of an element having atomic number 13 ? Name the valence shell of this atom.