Question

5. Write the names and symbols of the
constituent elements and identify their
valencies from the molecular formulae
given below.
KCI, HBr, MgBr,, K,O, NaH, Caci, CCI,
HI, H,S, Na, S. FeS, BCL​

Answer 1

KCl. potassium and chlorine

HBr hydrogen bromine

MgBr magnesium bromine

K potassium

O oxygen

NaH sodium hydride

CaCl calcium chloride

CCl carbon chlorine

HI hydride iodide

H hydrogen

S sulphur

Na sodium

FeS ferrous sulphide