Question

How to remember first 20 elements of the periodic table

Answer 1

There's a song on YouTube for all the elements of the periodic table

Answer 2

If you can remember the phrase and know the symbols for the elements then you can memorize the order of the elements.

Hi! - H
He - He
Lies - Li
Because - Be
Boys - B
Can - C
Not - N
Operate - O
Fireplaces - F

New - Ne
Nation - Na
Might - Mg
Also - Al
Sign - Si
Peace - P
Security - S
Clause - Cl

A - Ar
King - K
Can - Ca