If the valency of sodium is 1 and oxygen is 2, then the formula of compound formed between sodium and oxygen is?
Answers
Answer:
Hint: Chemical formula is an expression that is used to denote the number and types of elements that are present in one molecule of a compound. The chemical formula of sodium oxide contains two sodium atoms and one oxygen atom.
Complete step-by-step answer:
Sodium oxide is an ionic compound made up of sodium ions and oxide ions.
As we know that the electronic configuration of Na is 2,8,1. Since only one electron is present in the outermost shell or valence shell. Hence, its valency is +1.
The electronic configuration of oxygen is 2,6. Since six electrons are present in the outermost shell, so to calculate the valency for atoms 4 or more than four we have to subtract it from 8. So, the valency of oxygen should be (8−6) = 2.
Explanation:
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From the given question the correct answer is :
Na2O
If the valency of sodium is 1 and oxygen is 2, then the formula of compound formed between sodium and oxygen is Na2O.
Explanation:
Sodium has a valency +1
Oxide (from oxygen) has a valency of 2
In order for the sum to equal zero we must have two sodium ions for each oxide ion.
The formula = Na2O