Question

$X$ is an element of the modern periodic table. It is surrounded by elements having the atomic numbers $17,34,36$ and $53$.
(i) What is the atomic number of $X$?
(ii) Predict its position in the periodic table.
(iii) Which among these do not belong to the same period?

Answer 1

(i) Atomic Number of $=35$ ($Br$) Bromine

(ii) Position : Period 4 & Group 17

(iii) Elements with atomic number 17 & 53 do not belong to same period.