The position of some elements A, B, C, D, E, F and G in the Modern Periodic Table is given as under:

(a) In which group are inert elements placed? (b) What type of ions would B, C, E and F form? (c) Which elements would have chemical properties similar to C? (d) How many shells would A have? (e) What is the similarity between A and D? (f) Identify the most abundant element in the earth's crust.