Periodic table
en
fr
ar
es
pt
id
List
Compare
Tables
Quiz
Tools
Printables
Periodic table
›
calcium
›
Ca-43
Calcium-43 (Ca-43)
Identity
Protons
20
Neutrons
23
Mass number
43
Mass
42.96 ± 0.24 u
Mass excess
-38.409 MeV
Spin
7/2-*
Stability
stable
Natural occurrence
0.135 %
of calcium
All isotopes of calcium