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Neodymium

Neodymium Symbol Nd Atomic Number 60 Atomic Mass 144.242 g.mol −1 Discovered by Carl Auer von Welsbach in 1886... View Article

Xenon

Xenon Symbol Xe Atomic Number 54 Atomic Mass 131.293 g.mol −1 Discovered by William Ramsay in the year 1898 Xenon... View Article