Calcium
Isotopes of calcium
Main isotopes^			Decay	
	abundance	half-life Ciß)	mode	product
«Ca	96.9%	stable		
41Ca	trace	9 94 x104y	£	41K
«Ca	0.647%	stable		
«Ca	0.135%	stable		
«Ca	2.09%	stable		
«Ca	synth	163 d	P"	45Sc
«Ca	0.004%	stable		
47Ca	synth	45d	P~	47Sc
«Ca	0.187%	6.4*1019y	p-p-	4&n
The first element with six isotopes
Calcium
I   hydrogen —► helium
helium —► carbon + oxygen
carbon-► oxygen, sodium,
neon, + magnesium
]
neon —► oxygen + magnesium
oxygen —► silicon, sulphur phosphorus
silicon -► iron + nickel
iron-nickel core at center
Pure a process element