64
Gd
157.25
Gadolinium (Gd)
Element 64 · Period 6 · Lanthanide series
lanthanide
solid at room temp
f-block
About Gadolinium
MRI contrast agent. Highest neutron absorption. Used in nuclear control rods.
Physical Properties
Atomic Mass
157.25 u
State at 25°C
Solid
Melting Point
1312 °C
Boiling Point
3273 °C
Density
7.9 g/cm³
Magnetism
Ferromagnetic
Atomic Properties
Electron Configuration
[Xe] 4f⁷ 5d¹ 6s²
Electron Shells
2, 8, 18, 25, 9, 2
Electronegativity
1.2
Atomic Radius
237 pm
Ionization Energy
593 kJ/mol
Oxidation States
+3
Discovery & History
Discovered By
Jean Charles Galissard de Marignac
Discovery Year
1880
Named By
Jean Charles Galissard de Marignac
Name origin: Johan Gadolin (chemist)
Frequently Asked Questions
- Is Gadolinium a metal, nonmetal, or metalloid?
- Gadolinium is classified as a lanthanide.
- What state is Gadolinium in at room temperature?
- Gadolinium is a solid at standard room temperature (25°C).
- What is the atomic mass of Gadolinium?
- Gadolinium has an atomic mass of 157.25 atomic mass units (u).
- Who discovered Gadolinium?
- Gadolinium was discovered by Jean Charles Galissard de Marignac in 1880.
- Where is Gadolinium on the periodic table?
- Gadolinium is element number 64, located in period 6, part of the lanthanide series shown below the main table.