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Group 1 element
Alkali metals
noble gases
←
→
alkaline earth metals
IUPAC group number
1
Name by element
lithium group
Trivial name
alkali metals
CAS group number
(US, pattern A-B-A)
IA
old IUPAC number
(Europe, pattern A-B)
IA
↓
Period
2
Lithium
(Li)
3
3
Sodium
(Na)
11
4
Potassium
(K)
19
5
Rubidium
(Rb)
37
6
Caesium
(Cs)
55
7
Francium
(Fr)
87
Legend
primordial
element by radioactive decay
Atomic number color:
black=solid
External video
Reactions of the alkali metals with water
, conducted by The
Open University
...
Wikipedia
...