what is valency......
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Answer:
Valency is the number of atoms of a particular element that is combined with one atom of another element to form a molecule. Valency is also known as molecular weight. Valency is a measure of the combining power of an atom. The valency of an element is determined by the number of electrons in its outermost shell.
Answer:
Valency is the number of electrons gained, lost or shared by an atom of any element
Explanation:
Eg - Valency of Sodium (Na) is 1
To find valency you need to know the atomic number of the element
then put them as per needed in K L M and N shell
K shell holds 2 electrons
L shell holds 8 electrons
they cannot hold more than that
Eg - Sodium atomic number is 11
K shell = 2 Electrons
L shell = 8 electrons
Electrons left = 1 (valence electrons)
it will give away 1 electron and acquire a charge and become stable.
So 1 is the valency of sodium
Atoms can also gain electrons
if they have 7 valence electrons they gain 1 more to become stable