From English Wikipedia @ Freddythechick
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Carbon
C
Atomic Number: 6
Atomic Weight: 12.0107
Melting Point: 3948.15 K
Boiling Point: 4300 K
Specific mass: 2.267 g/cm3
Electronegativity: 2.55
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Silicon
Si
Atomic Number: 14
Atomic Weight: 28.0855
Melting Point: 1638.15 K
Boiling Point: 3538 K
Specific mass: 2.3296 g/cm3
Electronegativity: 1.9
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Germanium
Ge
Atomic Number: 32
Atomic Weight: 72.64
Melting Point: 1211.45 K
Boiling Point: 3106 K
Specific mass: 5.323 g/cm3
Electronegativity: 2.01
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Tin
Sn
Atomic Number: 50
Atomic Weight: 118.710
Melting Point: 505.21 K
Boiling Point: 2875 K
Specific mass: 7.287 g/cm3
Electronegativity: 1.96
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Lead
Pb
Atomic Number: 82
Atomic Weight: 207.2
Melting Point: 600.75 K
Boiling Point: 2022 K
Specific mass: 11.342 g/cm3
Electronegativity: 2.33
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Flerovium
Fl
Atomic Number: 114
Atomic Weight: [289]
Melting Point: ? 340 K
Boiling Point: ? 420 K
Specific mass: ? 22 g/cm3
Electronegativity: ?
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