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Arsenic

Arsenic Symbol As Atomic Number 33 Atomic Mass 74.922 Discovered by Arsenic was discovered by Albertus Magnus What... View Article

Aluminium

Aluminium Symbol of aluminium Al Atomic Number of aluminium 13 Atomic Mass of aluminium 26.98 amu Discovered by Hans Christian... View Article

Magnesium

Magnesium Symbol Mg Atomic Number 12 Atomic Mass 24.305 Discovered by Magnesium was discovered by Joseph Black... View Article

Neon

Neon Symbol Ne Atomic Number 10 Atomic Mass 20.180 Discovered by Neon was discovered by Sir William Ramsay and Morris Travers... View Article

Fluorine

Fluorine Symbol F Atomic Number 9 Atomic Mass 18.998403 g.mol-1 Discovered by Henri Moissan Group 17 Melting... View Article

Helium

Helium Symbol He Atomic number 2 Atomic mass 4.003 Discovered by Sir William Ramsay in London, Per Teodor Cleve and Nils Abraham... View Article