Question

The electronic structures of six elements A to Fare given in the table below. ​

Answer 1

Answer: ii and iv are wrong

Explanation:A- helium B- oxygen  compund water

Answer 2

A nonmetal that is valency that is Nitrogen, Phosphorous and Arsenic

Explanation:

The electronic structures of  six elements A to F are

• 1) Element E is present in Group 14. It has a valency of four. Thus, among the given elements, it forms only covalent compounds.
• 2)The element that is a metal with valency three. is Aluminium Metal, with valency 3, group number 13, period 3.
• 3)A non-metal that has valency three is nitrogen (N)
• 4)Element C is present in Group 15. It is a non-metal with five valence electrons. Thus, it has a valency of three.
• 5)Elements D and F are present in Group 18 of the periodic table. They belong to the family of inert/noble gases.