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Titanium
Ti
Atomic Number: 22
Atomic Weight: 47.867
Melting Point: 1933.15 K
Boiling Point: 3560 K
Specific mass: 4.54 g/cm3
Electronegativity: 1.54
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Zirconium
Zr
Atomic Number: 40
Atomic Weight: 91.224
Melting Point: 2125.15 K
Boiling Point: 4682 K
Specific mass: 6.506 g/cm3
Electronegativity: 1.33
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Hafnium
Hf
Atomic Number: 72
Atomic Weight: 178.49
Melting Point: 2500.15 K
Boiling Point: 4876 K
Specific mass: 13.31 g/cm3
Electronegativity: 1.3
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Rutherfordium
Rf
Atomic Number: 104
Atomic Weight: [267]
Melting Point: ? 2400 K
Boiling Point: ? 5800 K
Specific mass: ? 23 g/cm3
Electronegativity: ?
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