Question

How to learn atomic number of first 20 elements?

Answer 1

Hey!!!!

This is my technique of learning ⤵️

Ha
Hi
Li
Be
Bo
Ka
Na
O
F
Ne

S
Mu
A
C
P
S
Cl
Aa
Po
Ke

Now speak all continuously
Write it twice or thrice
And There you Go
For any Doubt regarding this
Comment

Hope this helps

Answer 2

You can learn the atomic numbers very easily...
All you have to do is to learn the name of elements in a systematic way... I mean 1 by 1...
Then it will be very easy for you to learn atomic numbers...
For eg:firstly you will say hydrogen and its atomic no is 1...