48
Cd
112.41
Cadmium (Cd)
Element 48 · Period 5 · Group 12
transition-metal
solid at room temp
d-block
About Cadmium
Toxic heavy metal. Used in Ni-Cd batteries and as a yellow pigment.
Physical Properties
Atomic Mass
112.41 u
State at 25°C
Solid
Melting Point
321.07 °C
Boiling Point
767 °C
Density
8.65 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[Kr] 4d¹⁰ 5s²
Electron Shells
2, 8, 18, 18, 2
Electronegativity
1.69
Atomic Radius
161 pm
Ionization Energy
868 kJ/mol
Oxidation States
+2
Discovery & History
Discovered By
Karl Samuel Leberecht Hermann
Discovery Year
1817
Named By
Karl Samuel Leberecht Hermann
Name origin: Latin: cadmia (calamine)
Frequently Asked Questions
- Is Cadmium a metal, nonmetal, or metalloid?
- Cadmium is classified as a transition-metal.
- What state is Cadmium in at room temperature?
- Cadmium is a solid at standard room temperature (25°C).
- What is the atomic mass of Cadmium?
- Cadmium has an atomic mass of 112.41 atomic mass units (u).
- Who discovered Cadmium?
- Cadmium was discovered by Karl Samuel Leberecht Hermann in 1817.
- Where is Cadmium on the periodic table?
- Cadmium is element number 48, located in period 5 and group 12.