Question

An element X has mass number 35 and the number of neutrons in its atom is 18
(a) To which group of the periodic table element X belongs?
(b) To which period of periodic table element X belongs ?
(c) What will be the formula of chloride of element X belongs?

Answer 1

1 answer is chlorine

Answer 2

a) 17 th group
b) 3 rd period
c) cl2