42
Mo
95.95
Molybdenum (Mo)
Element 42 · Period 5 · Group 6
transition-metal
solid at room temp
d-block
About Molybdenum
High melting point metal. Used in steel alloys, catalysts, and lubricants.
Physical Properties
Atomic Mass
95.95 u
State at 25°C
Solid
Melting Point
2623 °C
Boiling Point
4639 °C
Density
10.28 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Kr] 4d⁵ 5s¹
Electron Shells
2, 8, 18, 13, 1
Electronegativity
2.16
Atomic Radius
190 pm
Ionization Energy
685 kJ/mol
Oxidation States
+2 to +6
Discovery & History
Discovered By
Carl Wilhelm Scheele
Discovery Year
1778
Named By
Peter Jacob Hjelm
Name origin: Greek: molybdos (lead)
Frequently Asked Questions
- Is Molybdenum a metal, nonmetal, or metalloid?
- Molybdenum is classified as a transition-metal.
- What state is Molybdenum in at room temperature?
- Molybdenum is a solid at standard room temperature (25°C).
- What is the atomic mass of Molybdenum?
- Molybdenum has an atomic mass of 95.95 atomic mass units (u).
- Who discovered Molybdenum?
- Molybdenum was discovered by Carl Wilhelm Scheele in 1778.
- Where is Molybdenum on the periodic table?
- Molybdenum is element number 42, located in period 5 and group 6.