Question

The valency of an element can be determined with respect to
A)hydrogenation
B)chlorine atom
C) oxygen atom
D) All of these

Answer 1

Answer:

an element's Valencia is determined by the number of electrons in its outer shell. Hence,the number of valence electrons obtain from the electronic configuration of the element gives the valence I.e. the number of electrons lost, gained or shared by the element to attain the nobble gas configuration.

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Answer 2

(a) Hydrogen atom.

• The valency of an element is the number of hydrogen atoms that can combine with or replace one atom of the element (directly or indirectly).
• In other words, an element's valency is the number of electrons that an atom of the element uses to combine with atoms of other elements - it is the element's combining power.
• The electrons in the orbitals of the outermost shell of an atom are the valence electrons, which can be used in combining with other atoms (also called valence shells).
• For example, one hydrogen atom combines with one chlorine atom to form HCl, where the valency of chlorine is 1.

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