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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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