Question

the trick to learn the first 20 elements.

Answer 1

The first 20 elements of periodic table are:
1.HYDROGEN
2.HELIEUM
3.LITHIUM
4.BERYLLIUM
5.BORON
6.CARBON
7.NITROGEN
8 OXYGEN
9.FLUORINE
10.NEON
11.SODIUM
12.MAGNESIUM
13.ALUMINIUM
14.SILICON
15. PHOSPHORUS
16. SULPHUR
17.CHLORINE
18. ARGON
POTASSIUM
20.CALCIUM
       FRIEND 

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

 i think this is very helpful to u

Answer 2

The numbers are their atomic numbers, which is how many protons are in an atom of that element.

• Hydrogen - H.
• Helium - He.
• Lithium - Li.
• Beryllium - Be.
• Boron - B.
• Carbon - C.
• Nitrogen - N.
• Oxygen - O.