Question

Name
(a) An alkali metal in period 3 and halogen in period 2.
(b) The noble gas with 3 shells.
(c) The non-metals present in period 2 and metals in
period 3.
(d) The element of period 3 with valency 4.​

Answer 1

Answer:

(a) Sodium and Fluorine

(b) Argon

(c) Carbon, Nitrogen,Oxygen, Fluorine and Sodium,Magnesium, Aluminium

(d) Sulphur