Question

5. Write the names and symbols of the
constituent elements and identify their
valencies from the molecular formulae
given below.
KCI, HBr, MgBrı, K,O, NaH, CaCl, CC1,
HI, H,S, Na S, FeS, BaCl,

Answer 1

Explanation:

KCl- Potassium Chloride = Potassium + Chlorine

HBr- Hydrogen Bromide = Hydrogen + Bromine

MgBr- Magnesium Bromide = Magnesium + Bromine

K= Potassium

O= Oxygen

NaH= Sodium Hydroxide = Sodium + Hydrogen

CaCl= Calcium Chloride= Calcium + chlorine

BaCl= Barium Chloride =Barium+ Chlorine

I knew this much only.!

Answer 2

Answer:

1) potassium chloride valency is k+/cl-. 2) Hydrogen bromide. valency is H+/ Br- , 3)Magnesium bromide. valency is mg+2& Br- ,. 4)k potassium,. 5) oxygen. valency is o-2. ,6) Sodium Hydride. valency = Na+ & H-. 7) Calcium chloride. Valency is Ca+2 & cl-. 8) samaj nahi aaya Raha formula. 9) Hydrogen Iodide. valency is I-

10)s is Sulphur. 11)FeS is Ferrous sulphate valency is Fe+2 & s-2.

12) Barrium chloride valency is Ba+2 & cl -