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Boron B Atomic Number: 5 Atomic Weight: 10.811 Melting Point: 2573.15 K Boiling Point: 4200 K Specific mass: 2.34 g/cm3 Electronegativity: 2.04
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Aluminium Al Atomic Number: 13 Atomic Weight: 26.9815386 Melting Point: 933.4 K Boiling Point: 2792 K Specific mass: 2.698 g/cm3 Electronegativity: 1.61
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Gallium Ga Atomic Number: 31 Atomic Weight: 69.723 Melting Point: 302.91 K Boiling Point: 2477 K Specific mass: 5.907 g/cm3 Electronegativity: 1.81
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Indium In Atomic Number: 49 Atomic Weight: 114.818 Melting Point: 429.91 K Boiling Point: 2345 K Specific mass: 7.31 g/cm3 Electronegativity: 1.78
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Thallium Tl Atomic Number: 81 Atomic Weight: 204.3833 Melting Point: 577.15 K Boiling Point: 1746 K Specific mass: 11.85 g/cm3 Electronegativity: 1.62
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Nihonium Nh Atomic Number: 113 Atomic Weight: [286] Melting Point: ? 700 K Boiling Point: ? 1400 K Specific mass: ? 18 g/cm3 Electronegativity: ?
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