Bohr's periodic table has seven horizontal rows called periods and eighteen vertical columns called groups. Alternatively, the elements of the Bohr's table are divided into four blocks namely S- and f-blocks. Group, period and block of given element can be predicted with the help of its electronic configuration.
(I) The principle quantum number of valence shell refers to period of elements
(II) The nature of subshell (S. p or d) having last electron refers the block to which the element belongs.
(III) The number of electrons present in outermost or penultimate shell predicts the group of element.
For s-block, the group number = No. of valence electron
For p-block, the group number `=10 +` numbers of valence electron
For d-block, the group number `=2 +(n-1) d` electrons
The element of atomic number 36 belongs to

Options

A. `3 ^(rd)` period and p- block
B. `4^(th)` period and p-block
C. `4^(th)` period and s-block
D. `3^(rd)` period and d- block

Answer

B