Tin

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

Property	Value
Atomic Number	50
Element	Tin
Symbol	Sn
Atomic Mass	118.710 u
Number of Neutrons	69 (most common isotope, Tin-119)
Number of Protons	50
Number of Electrons	50
Period	5
Group	14
Phase	Solid
Radioactive	No
Natural	Yes
Metal	Yes
Nonmetal	No
Metalloid	No
Type	Post-transition Metal
Atomic Radius	145 pm
Electronegativity	1.96 (Pauling scale)
First Ionization Energy	7.344 eV
Density	7.31 g/cm³
Melting Point	231.93 °C
Boiling Point	2602 °C
Number of Isotopes	10 stable (Sn-112, Sn-114, Sn-115, Sn-116, Sn-117, Sn-118, Sn-119, Sn-120, Sn-122, Sn-124)
Discoverer	Known since ancient times
Year	Unknown
Specific Heat	0.227 J/g·K
Number of Shells	5
Number of Valence Electrons	4