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Copper
Cu
Atomic Number: 29
Atomic Weight: 63.546
Melting Point: 1357.75 K
Boiling Point: 2835 K
Specific mass: 8.96 g/cm3
Electronegativity: 1.9
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Silver
Ag
Atomic Number: 47
Atomic Weight: 107.8682
Melting Point: 1234.15 K
Boiling Point: 2435 K
Specific mass: 10.501 g/cm3
Electronegativity: 2.2
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Gold
Au
Atomic Number: 79
Atomic Weight: 196.966569
Melting Point: 1337.73 K
Boiling Point: 3129 K
Specific mass: 19.282 g/cm3
Electronegativity: 2.54
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Roentgenium
Rg
Atomic Number: 111
Atomic Weight: [281]
Melting Point: ? K
Boiling Point: ? K
Specific mass: ? 28.7 g/cm3
Electronegativity: ?
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