Question

Valency of a radical is always equal to the number of atoms combining to form a radical.
A. True
B. False

Answer 1

Valency is nothing but the combining power of an element, valency tells us that how many electrons are required by an element to complete the octet of its outermost shell or we can say valency is the number of hydrogen atoms that can combine with the atom.

Complete step by step answer:
The term valence refers to the combining capacity of molecules and ions. Basically valency is the number of electrons lost or gained to complete the octet of outermost shell or we can say to complete the duplets. Duplets here refers to the maximum capacity of the outermost shell i.e. two electrons in the outermost shell or eight electrons in the outermost shell.
The other definition for the term valency can be, the number of hydrogen atoms required to displace the radicals or atoms for the formation of a compound is known as valency. Some other terms are also used in chemistry to tell the valency of the elements such as monovalent, divalent etc.
The term monovalent indicates that the element has valency one and the term divalent indicates that the element has valency two and similarly trivalent indicates for the valency three.
We can also say that the valency is the combining power of an element with the other element whose valency is known. Hence we can say that valency of a radical is always equal to the number of atoms combining to form a radical.
So the statement is True.

Note:
The term valency can be defined for any chemical composition, it can be defined for elements as well as compounds. For elements the number of electrons gained or lost is valency while for compounds the number of hydrogen atoms that can combine with is known as valency.