Question

valency, atomic number and symbol of first 30 elements in periodic tablein which how we can find valency ​

Answer 1

Answer:

valency can be found out by subtracting the number of atoms present in the outer most shell of the atom from the capacity of the outermost shell of the atom

Explanation:

for example

number of atoms in the outermost shell in hydrogen=1

capacity of outermost shell in hydrogen=2

therefore valency=2-1

=1

therefore valency of hydrogen is 1

similarly, valencies of the first 30 elements can be found