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আয়রন
Atomic Number: ২৬
Atomic Weight: 55.845
Melting Point: 1808.15 K
Boiling Point: 3134 K
Specific mass: 7.874 g/cm3
Electronegativity: 1.83
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রুথেনিয়াম
Atomic Number: ৪৪
Atomic Weight: 101.07
Melting Point: 2523.15 K
Boiling Point: 4423 K
Specific mass: 12.37 g/cm3
Electronegativity: 2.2
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অসমিয়াম
Atomic Number: ৭৬
Atomic Weight: 190.23
Melting Point: 3300.15 K
Boiling Point: 5285 K
Specific mass: 22.61 g/cm3
Electronegativity: 2.2
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হ্যাসিয়াম
Atomic Number: ১০৮
Atomic Weight: [269]
Melting Point: ? K
Boiling Point: ? K
Specific mass: ? g/cm3
Electronegativity: ?
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