We made a periodic table of the first 20 elements on the periodic table those elements are Hydrogen (H), Helium (He), Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen, Oxygen (O), Purine (F), Neon (Ne), Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorus (P), Sulphur (S), Chlorine (Cl), Argon (Ar), Potassium (K) and Calcium (Ca).
The amounts of shells in every period are in Hydrogen has 1 shell, Helium has 2 Shells, Lithium has 2, 1 Shells, Beryllium has 2,2 Shells, Boron has 2,3 shells, Carbon has 2,4 shells, Nitrogen has 2,5 shells, Oxygen has 2,6 shells, Phlorine has 2,7 shells, Neon has 2,8 shells, Sodium has 2,8,1 shells, Magnesium has 2,8,2 shells, Aluminium has 2,8,3 shells, Silicon has 2,8,4 shells, Phosphorus has 2,8,5 shells, Sulfur has 2,8,6 shells, Chlorine has 2,8,7 shells, Argon has 2,8,8 shells, Potassium has 2,8,8,1 shells and Calcium has 2,8,8,2 shells.