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1A

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8B
1
H




2
He
1.008
hydrogen

2A



3B

4B

5B

6B

7B
4.003
helium
3
Li
4
Be

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5
B
6
C
7
N
8
O
9
F
10
Ne
6.941
lithium
9.012
berylium

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10.81
boron
12.01
carbon
14.01
nitrogen
16.00
oxigen
19.00
fluorine
20.18
neon
11
Na
12
Mg



13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
22.99
sodium
24.31
magnesium

3A

4A

5A

6A

7A

? 8 ?

1B

2B
26.98
aluminum
28.09
silicon
30.97
phosphorus
32.06
sulfur
35.45
chlorine
39.95
argon
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
39.10
potassium
40.08
calcium
44.96
scandium
47.90
titanium
50.94
vanadium
52.00
chromium
54.94
manganese
55.85
iron
58.93
cobalt
58.70
nickel
63.55
copper
65.38
zinc
69.72
galium
72.59
germanium
74.92
arsenic
78.96
selenium
79.90
bromine
83.80
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