Question

Write the names and symbols of the
constituent elements and identify their
valencies from the molecular formulae
given below.
KCI, HBr, MgBr², K²O, NaH, CaC², CCI⁴,
HI, H²S, Na²S, FeS, BaCl²​

Answer 1

Answer:

KCI...........potassium chloride

HBr.........Hydrobromic acid

MgBr²............... Magnesium bromide

K²O.................. Potassium oxide

NaH................... sodium hydride

CaC².................calcium carbide

CCI⁴,......... Tetrachloromethane

HI.......... hydrogen iodide

H²S............. hydrogen sulfide

Na²S............. sodium sulfide

FeS.............. ferrous sulfide  

BaCl²​............. barium chloride

Answer 2

Answer:

KCl -potassium chloride

HBr -hydrogen bromide

MgBr² -magnesium bromide

K²O -potassium oxide

NaH -sodium hydride

CaC² -calcium carbide

CCl⁴ - carbon tetrachloride

HI - hydrogen iodide

H²S- hydrogen sulphide

Na²S-sodium sulphide

FeS-ferrous sulphide

BaCl²- barium chloride

I hope my answer helps you☺☺