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Alkaline earth
Alkaline earth metals
alkali metals
←
→
group 3
IUPAC group number
2
Name by element
beryllium group
Trivial name
alkaline earth metals
CAS group number
(US, pattern A-B-A)
IIA
old IUPAC number
(Europe, pattern A-B)
IIA
↓
Period
2
Beryllium
(Be)
4
3
Magnesium
(Mg)
12
4
Calcium
(Ca)
20
5
Strontium
(Sr)
38
6
Barium
(Ba)
56
7
Radium
(Ra)
88
Legend
primordial element
element by radioactive decay
Atomic number color:
black=solid
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Wikipedia
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