Question

An element x belongs to 3rd period and group 17 of the periodic table state its



e. C , valency and justify your answer with reasoning

Answer 1

Group 17 normally consists elements which are generally referred to as halogens. It consists of Fluorine, Chlorine, Bromine, Iodine and Astatine. The members of this group generally deviate from each other in terms of physical properties for in stance Fluorine and Chlorine are gaseous, bromine is liquid and iodine and astatine are solids.

So with that background, the answer to your question is Chlorine. Electronic configuration is 1s2, 2s2, 2p6, 3s2, 3p5 and it' valency is 7.

valency electrons are the electrons found in the outermost energy level.