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Manganese Mn Atomic Number: 25 Atomic Weight: 54.938045 Melting Point: 1519.15 K Boiling Point: 2334 K Specific mass: 7.44 g/cm3 Electronegativity: 1.55
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Technetium Tc Atomic Number: 43 Atomic Weight: [98] Melting Point: 2473.15 K Boiling Point: 5150 K Specific mass: 11.5 g/cm3 Electronegativity: 1.9
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Rhenium Re Atomic Number: 75 Atomic Weight: 186.207 Melting Point: 3453.15 K Boiling Point: 5869 K Specific mass: 21.02 g/cm3 Electronegativity: 1.9
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Bohrium Bh Atomic Number: 107 Atomic Weight: [270] Melting Point: ? K Boiling Point: ? K Specific mass: ? 37 g/cm3 Electronegativity: ?
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