Hydrogen has an atomic number of 4.
Beryllium has an atomic number of 7
Lithium has an atomic number of 11
Nitrogen has an atomic number of 7
Potassium has an atomic number of 19.
Aluminum has an atomic number of 13.
14.
potassium
magnesium
silicon
sodium
18.
calcium
chlorine
argon
phosphorous
12
aluminum
neon
fluorine
6
lithium
boron
carbon
10
Li
Ne
Na
Mg
20
C
He
Ca
Cl
3
Be
B
O
4
F
5