ID
Atomic Number
Name
Symbol
Atomic Mass
Group
Periods
1
1
Hydrogen
H
1.00794(7)
1
1
2
2
Helium
He
4.002602(2)
18
1
3
3
Lithium
Li
6.941(2)
1
2
4
4
Beryllium
Be
9.012182(3)
2
2
5
5
Boron
B
10.811(7)
13
2
6
6
Carbon
C
12.0107(8)
14
2
7
7
Nitrogen
N
14.0067(2)
15
2
8
8
Oxygen
O
15.9994(3)
16
2
9
9
Fluoro
F
18.9984032(5)
17
2
10
10
Neon
Ne
20.1797(6)
18
2
11
11
Sodium ( I Natrium )
Na
22.98976928(2)
1
3
12
12
Magnesium
Mg
24.3050(6)
2
3
13
13
Aluminum
Al
26.9815386(8)
13
3
14
14
Silica
Si
28.0855(3)
14
3
15
15
Phosphorus
P
30.973762(2)
15
3
16
16
Sulfur
S
32.065(5)
16
3
17
17
Chlorine
Cl
35.453(2)
17
3
18
19
Potassium ( Kalium )
K
39.0983(1)
1
4
19
18
Argon
Ar
39.948(1)
18
3
20
20
Calcium
Ca
40.078(4)
2
4
21
21
Scandium
Sc
44.955912(6)
3
4
22
22
Titanium
Ti
47.867(1)
4
4
23
23
Vanadium
V
50.9415(1)
5
4
24
24
Chrome
Cr
51.9961(6)
6
4
25
25
Manganese
Mn
54.938045(5)
7
4
26
26
Iron ( Ferrum )
Fe
55.845(2)
8
4
27
28
Nickel
Ni
58.6934(2)
10
4
28
27
Cobalt
Co
58.933195(5)
9
4
29
29
Copper ( Cuprum )
Cu
63.546(3)
11
4
30
30
Zinc
Zn
65.409(4)
12
4
31
31
Gallium
Ga
69.723(1)
13
4
32
32
Germanium
Ge
72.64(1)
14
4
33
33
Arsenic
As
74.92160(2)
15
4
34
34
Selenium
Se
78.96(3)
16
4
35
35
Bromine
Br
79.904(1)
17
4
36
36
Krypton
Kr
83.798(2)
18
4
37
37
Rubidium
Rb
85.4678(3)
1
5
38
38
Strontium
Sr
87.62(1)
2
5
39
39
Yttrium
Y
88.90585(2)
3
5