if the valency of oxygen is 2, derive the valency of the other elements present in the following oxides : (a) sodium oxide, zinc oxide, lead oxide, aluminium oxide, calcium oxide, barium oxide, copper oxide. (b) name the element present in the following compounds and write their valancies (1) cooper (2) hydroxide (c) sulphur dioxide.
Answers
Answer:
Explanation:
Steps:
1) Valency of oxygen is 2 .
We know valency of one element is equally distributed to identical atoms.
a) Na2O.:
Valency of 2 Na,Sodium = Valency of O
=>2 * Valency of Na, Sodium = 2
=> Valency of Na= 1
b) Zinc Oxide (ZnO) :
Valency of Zn, Zinc = Valency of O
=> Valency of Zn = 2
c) Lead Oxide (PbO) :
Valency of Pb = Valency of O
=> Valency of Pb (Lead) = 2
d) Aluminium Oxide (Al2O3) :
Valency of 2 Al = Valency of 3 O
=>2 * Valency of Al = 3*2
=> Valency of Al = 3
e) Calcium Oxide (CaO) :
Valency of Ca = Valency of O
=> Valency of Ca = 2
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Answer:
Steps:
1) Valency of oxygen is 2 .
We know valency of one element is equally distributed to identical atoms.
a) Na2O.:
Valency of 2 Na,Sodium = Valency of O
=>2 * Valency of Na, Sodium = 2
=> Valency of Na= 1
b) Zinc Oxide (ZnO) :
Valency of Zn, Zinc = Valency of O
=> Valency of Zn = 2
c) Lead Oxide (PbO) :
Valency of Pb = Valency of O
=> Valency of Pb (Lead) = 2
d) Aluminium Oxide (Al2O3) :
Valency of 2 Al = Valency of 3 O
=>2 * Valency of Al = 3*2
=> Valency of Al = 3
e) Calcium Oxide (CaO) :
Valency of Ca = Valency of O
=> Valency of Ca = 2
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