Describe in brief the main features of the long form of the periodic table.

The electron distribution of the elements represented by the letters A, B, C, and D are as follows. 

A$(2, 8, 2)$, B$(2,7)$, C$(2,8,8)$, D$(2,8,8,2)$

Name the elements which belong to the same group.

A ($2, 8, 2$), B ($2, 7$), C ($2, 8, 8$), D ($2, 8, 8, 2$)

A ($2, 8, 2$), B ($2, 7$), C ($2, 8, 8$), D ($2, 8, 8, 2$)

Which of the elements are metals?