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Write the Names and Symbols of the Constituent Eleements and Identify Their Valencies from the Molecular Formulae Given Below. - SSC (English Medium) Class 8 - Science

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Question

Write the names and symbols of the constituent elements and identify their valencies from the molecular formulae given below.

KCl,   HBr,   MgBr2,   K2O,  NaH,   CaCl2,  CCl4,  HI,   H2S, Na2S,   FeS,   BaCl2

Solution

Compounds Name of compounds Symbol of constituent elements Valency of constituent elements
KCl Potassium chloride K, Cl K = 1, Cl = 1
HBr Hydrogen bromide K, Br K = 1, Br = 1 
MgBr2 Magnesium bromide Mg, Br Mg = 2, Br = 1
K2O Potassium oxide K, O K = 1, O = 2
NaH Sodium hydride Na, H Na = 1, H = 1
CaCl2 Calcium chloride Ca, Cl Ca = 2, Cl = 1
CCl4 Carbon tetrachloride C, Cl C = 4, Cl = 1
HI Hydrogen iodide H, I H = 1, I = 1
H2S Hydrogen sulphide H, S H = 1, S = 2
Na2S Sodium sulphide  NaS Na = 1S = 2
FeS Iron (II) Sulfide Fe, S F = 2, S = 2
BaCl2 Barium chloride Ba, Cl B = 2, Cl = 1
  Is there an error in this question or solution?

APPEARS IN

 Balbharati Solution for Balbharati Class 8 Science - General Science (2018 to Current)
Chapter 6: Composition of Matter
Exercise | Q: 5 | Page no. 47
Solution Write the Names and Symbols of the Constituent Eleements and Identify Their Valencies from the Molecular Formulae Given Below. Concept: Molecular Formula and Valency.
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