Question

An element belongs to 4th period and group 17 of the periodic table. Find out: 

(a) The number of valence electrons. 

(b) Is it a metal or non-metal. 

(c) The name of the element. 

(d) Formula of its compound with hydrogen. 

(e) Electron dot structure of this element with calcium.

Answer 1

(a) We know that every element of group 17 has 7 valence electrons. So this element also has 7 valence electrons. 

(b) It is non-metal because it can only gain electron. 

(c) Its name is Bromine (Br). 

(d) The formula of its compound with hydrogen is HBr. 

(e)