Camila Doc

1_ Hidrogeno : representado con el simbolo H y el numero 1
2_ helio : representado con el simbolo he y el numero 2
3_ litio : representado con el simbolo LI y el numero 3
4_berilio : representado con el simbolo BE y el numero 4



Número atómico[pic] |Nombre[pic] |Símbolo[pic] |Periodo,
Grupo[pic] |Masa atómica
(g/Mol)[pic] |Densidad
(g/cm³)
a 20°C[pic] |Fusión (°C)[pic] |Ebullición
 (°C)[pic] |Año de su
descubrimiento[pic] |Descubridor[pic] | |1 |Hidrógeno |H |1, 1 |1.00794(7)(2) (3) (4) |0.084 g/l |-259.1 |-252.69 |1766 |Cavendish | |2 |Helio |He |1, 18|4.002602(2)(2) (4) |0.17 g/l |-272.2 |-268.9 |1895 |Ramsay y Cleve | |3 |Litio |Li |2, 1 |6.941(2)(2) (3) (4) (5) |0.53 |180.5 |1317 |1817 |Arfwedson | |4 |Berilio |Be |2, 2 |9.012182(3) |1.85|1278 |2970 |1797 |Vauquelin | |5 |Boro |B |2, 13 |10.811(7)(2) (3) (4) |2.46 |2300 |2550 |1808 |Davy y Gay-Lussac | |6 |Carbono |C |2, 14 |12.0107(8)(2) (4) |3.51 |3550 |4827 |Prehistoria |Desconocido| |7 |Nitrógeno |N |2, 15 |14.0067(2)(2) (4) |1.17 g/l |-209.9 |-195.8 |1772 |Rutherford | |8 |Oxígeno |O |2, 16 |15.9994(3)(2) (4) |1.33 g/l |-218.4 |-182.9 |1774 |Priestly y Scheele | |9 |Flúor|F |2, 17 |18.9984032(5) |1.58 g/l |-219.6 |-188.1 |1886 |Moissan | |10 |Neón |Ne |2, 18 |20.1797(6)(2) (3) |0.84 g/l |-248.7 |-246.1 |1898 |Ramsay y Travers | |11 |Sodio |Na |3, 1 |22.98976928(2)|0.97 |97.8 |892 |1807 |Davy | |12 |Magnesio |Mg |3, 2 |24.3050(6) |1.74 |648.8 |1107 |1755 |Black | |13 |Aluminio |Al |3, 13 |26.9815386(8) |2.70 |660.5 |2467 |1825 |Oersted | |14 |Silicio |Si |3, 14|28.0855(3)(4) |2.33 |1410 |2355 |1824 |Berzelius | |15 |Fósforo |P |3, 15 |30.973762(2) |1.82 |44 (P4) |280 (P4) |1669 |Brand | |16 |Azufre |S |3, 16 |32.065(5)(2) (4) |2.06 |113 |444.7|Prehistoria |Desconocido | |17 |Cloro |Cl |3, 17 |35.453(2)(2) (3) (4) |2.95 g/l |-34.6 |-101 |1774 |Scheele | |18 |Argón |Ar |3, 18 |39.948(1)(2) (4) |1.66 g/l |-189.4 |-185.9 |1894 |Ramsay y Rayleigh |...