Cadmium

Koushik 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08

Property	Value
Atomic Number	48
Element	Cadmium
Symbol	Cd
Atomic Mass	112.414 u
Number of Neutrons	64 (most common isotope, Cadmium-112)
Number of Protons	48
Number of Electrons	48
Period	5
Group	12
Phase	Solid
Radioactive	No
Natural	Yes
Metal	Yes
Nonmetal	No
Metalloid	No
Type	Transition Metal
Atomic Radius	161 pm
Electronegativity	1.69 (Pauling scale)
First Ionization Energy	8.994 eV
Density	8.65 g/cm³
Melting Point	321.07 °C
Boiling Point	767 °C
Number of Isotopes	8 naturally occurring (Cd-106, Cd-108, Cd-110, Cd-111, Cd-112, Cd-113, Cd-114, Cd-116)
Discoverer	Friedrich Stromeyer
Year	1817
Specific Heat	0.232 J/g·K
Number of Shells	5
Number of Valence Electrons	12