Roentgenium (Rg)

Atomic Number 111

Atomic Mass: 280

Atomic Number: 111

Number of protons: 111

Number of Neutrons: 179

number of electrons: 111

Element Family: Transition Metals

Boiling Point: Unknown

Melting Point: Unknown

Discovered by: Sigurd Hofman on December 8, 1994

Was named in honor of German Physicist Wilhelem Conrad Rontgen

There are 12 known isotopes

It is silvery

It is a solid

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Gonzalo Cardenas