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