Hola!!
Z SÍMBOLO ELEMENTO GRUPO
1 H Hidrógeno 1
2 He Helio 18
3 Li Litio 1
4 Be Berilio 2
Saludos!!
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Hola!!
Z SÍMBOLO ELEMENTO GRUPO
1 H Hidrógeno 1
2 He Helio 18
3 Li Litio 1
4 Be Berilio 2
Saludos!!