Consider the table given below and answer the following questions:
(i) Name the most reactive metal.
(ii) How many shells does 'd' have ?
(iii) Name the element(s) having valency 2
(iv) How many valence electrons does 'j' have ?
(v) Which is more non-metallic, ‘h’ or ‘i’ ?
(vi) The atom of which element is bigger in size, 'e' or 'h' ?