Question

How to find period no. And group no. In configuration according to aufbav rule

Answer 1

Hey mate.....^_^

Here's ur ans. ⬇

↪ Position of elements in periodic table is determined by calculating group no. and periodic no. as follows

✡ PERIOD NO. -- Highest value of principal quantum no.

✡ GROUP NO. -- For s - block elements = Valence electrons I.e. nse

For p- block elements = Valence electrons (nse + npe) + 10

For d - block elements = Valence electrons nse + (n-1 ) d electrons

__________

✌Hope it helps

Answer 2

Hey!!!...Here is ur answer

Find period and group no.

First we write the configuration of that element

then the period is=Principal quantum no. of valence shell

and the group= Position of last electron of valence shell.

Hope it will help you