How can I learn the valencies of the first 20 elements?
Valency:-
Determination of valency of first 20 elements:-
Therefore, the valency of the first 20 elements can be determined by the unit value of their respective group number.
How to learn first 20 elements of periodic table easily?
hello, my self saloni i have i doubt for converting word equation to formula equation.
i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.