|
Nomor Atom
|
Lambang
Atom
|
Nama Unsur
|
Golongan
|
Periode
|
|
4
|
Be
|
Berilium
|
I I A
|
2
|
|
12
|
Mg
|
Magnesium
|
3
|
|
|
20
|
Ca
|
Kalsium
|
4
|
|
|
38
|
Sr
|
Stronsium
|
5
|
|
|
56
|
Ba
|
Barium
|
6
|
|
|
88
|
Ra
|
Radium
|
7
|
|
Nomor Atom
|
Lambang
Atom
|
Nama Unsur
|
Golongan
|
Periode
|
|
5
|
B
|
Boron
|
I I I A
|
2
|
|
13
|
Al
|
Alumunium
|
3
|
|
|
31
|
Ga
|
Galium
|
4
|
|
|
49
|
In
|
Indium
|
5
|
|
|
81
|
Tl
|
Talium
|
6
|
|
|
|
|
|
|
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