Can u pls solve the 5 th one
Given that an atom contains 17 protons and 18 neutrons. Let the given element be X.
Then mass number of the element is equal to sum of the number of protons and neutrons.
Mass number is equal to 17+18=35.
Mass number is equal to 35.
So the given element is chlorine.
Electronic configuration = 2,8,7
Then mass number of the element is equal to sum of the number of protons and neutrons.
Mass number is equal to 17+18=35.
Mass number is equal to 35.
So the given element is chlorine.
Electronic configuration = 2,8,7
Group no- 17
(Valence electrons 7 means group = 10+7 = 17)
Period - 3
(Electronic configuration shows 3 shells means period 3)
Valency = 8-7 => 1
Valency = 8-7 => 1