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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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