H¹. He²
Li³ Be⁴ B⁵ C⁶ N⁷ О⁸ F⁹ Ne¹⁰
Na¹¹ Mg¹² Al¹³ Si¹⁴ P¹⁵ S¹⁶ Cl¹⁷ Ar¹⁸
K¹⁹ Ca²⁰ Ga³¹ Ge³² As³³ Se³⁴ Br³⁵ Kr³⁶
H¹. He²
Li³ Be⁴ B⁵ C⁶ N⁷ О⁸ F⁹ Ne¹⁰
Na¹¹ Mg¹² Al¹³ Si¹⁴ P¹⁵ S¹⁶ Cl¹⁷ Ar¹⁸
K¹⁹ Ca²⁰ Ga³¹ Ge³² As³³ Se³⁴ Br³⁵ Kr³⁶