There are 4 shells in the element X. The 3d subshell of X contains 6 electrons.
(symbol is not real)
a. Write down the complete subshell electronic configuration of X.
b. Identify the Group and block.
c. Write two characteristics of the elements in which X is included?
d From which subshell does this element loses its electrons to show +2 oxidation state?

Explanation

`a. 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2`
b. Group - 8, block - d
c. They are metals
can form coloured compounds.
d. s subshell