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Periodic Table of Elements

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The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number.

Today, with 118 known elements, it is widely regarded as one of the most significant achievements in science.

1

H

Hydrogen

1.008

1

2

He

Helium

4.0026

2

3

Li

Lithium

6.94

3

4

Be

Beryllium

9.0122

2
2

5

B

Boron

10.81

2
3

6

C

Carbon

12.011

2
4

7

N

Nitrogen

14.007

2
5

8

O

Oxygen

15.999

2
6

9

F

Flourine

18.998

2
7

10

Ne

Neon

20.18

2
8

11

Na

Sodium

22.99

2
8
1

12

Mg

Magnesium

24.305

2
8
2

13

Al

Aluminium

26.982

2
8
3

14

Si

Silicon

28.085

2
8
4

15

P

Phosphorus

30.974

2
8
5

16

S

Sulfur

32.06

2
8
6

17

Cl

Chlorine

35.45

2
8
7

18

Ar

Argon

39.948

2
8
8

19

K

Potassium

39.098

2
8
8
1

20

Ca

Calcium

40.078

2
8
8
2

21

Sc

Scandium

44.956

2
8
9
2

22

Ti

Titanium

47.867

2
8
10
2

23

V

Vanadium

50.942

2
8
11
2

24

Cr

Chromium

51.996

2
8
13
1

25

Mn

Manganese

54.938

2
8
13
2

26

Fe

Iron

55.845

2
8
14
2

27

Co

Cobalt

58.933

2
8
15
2

28

Ni

Nickel

58.693

2
8
16
2

29

Cu

Copper

63.546

2
8
18
1

30

Zn

Zinc

65.38

2
8
18
2

31

Ga

Gallium

69.723

2
8
18
3

32

Ge

Germanium

72.63

2
8
18
4

33

As

Arsenic

74.922

2
8
18
5

34

Se

Selenium

78.971

2
8
18
6

35

Br

Bromine

79.904

2
8
18
7

36

Kr

Krypton

83.798

2
8
18
8

37

Rb

Rubidium

85.468

2
8
18
8
1

38

Sr

Strontium

87.62

2
8
18
8
2

39

Y

Yttrium

88.906

2
8
18
9
2

40

Zr

Zirconium

91.224

2
8
18
10
2

41

Nb

Niobium

92.906

2
8
18
12
1

42

Mo

Molybdenum

95.95

2
8
18
13
1

43

Tc

Technetium

(98)

2
8
18
13
2

44

Ru

Ruthenium

101.07

2
8
18
15
1

45

Rh

Rhodium

102.91

2
8
18
16
1

46

Pd

Palladium

106.42

2
8
18
18

47

Ag

Silver

107.87

2
8
18
18
1

48

Cd

Cadmium

112.41

2
8
18
18
2

49

In

Indium

114.82

2
8
18
18
3

50

Sn

Tin

204.38

2
8
18
18
4

51

Sb

Antimony

121.76

2
8
18
18
5

52

Te

Tellurium

127.6

2
8
18
18
6

53

I

Iodine

126.9

2
8
18
18
7

54

Xe

Xenon

131.29

2
8
18
18
8

55

Cs

Caesium

132.91

2
8
18
18
8
1

56

Ba

Barium

137.33

2
8
18
18
8
2

57

La

Lanthanum

138.91

2
8
18
18
9
2

58

Ce

Cerium

140.12

2
8
18
19
9
2

59

Pr

Praseodymium

140.91

2
8
18
21
8
2

60

Nd

Neodymium

144.24

2
8
18
22
8
2

61

Pm

Promethium

144.24

2
8
18
23
8
2

62

Sm

Samarium

150.36

2
8
18
24
8
2

63

Eu

Europium

151.96

2
8
18
25
8
2

64

Gd

Gadolinium

157.25

2
8
18
25
9
2

65

Tb

Terbium

158.93

2
8
18
27
8
2

66

Dy

Dysprosium

162.5

2
8
18
28
8
2

67

Ho

Holmium

164.93

2
8
18
29
8
2

68

Er

Erbium

167.26

2
8
18
30
8
2

69

Tm

Thulium

168.93

2
8
18
31
8
2

70

Yb

Ytterbium

173.05

2
8
18
32
8
2

71

Lu

Lutetium

174.97

2
8
18
32
9
2

72

Hf

Hafnium

178.49

2
8
18
32
10
2

73

Ta

Tantalum

180.95

2
8
18
32
11
2

74

W

Tungsten

183.84

2
8
18
32
12
2

75

Re

Rhenium

186.21

2
8
18
32
13
2

76

Os

Osmium

190.23

2
8
18
32
14
2

77

Ir

Iridium

192.22

2
8
18
32
15
2

78

Pt

Platinum

195.08

2
8
18
32
17
1

79

Au

Gold

196.97

2
8
18
32
18
1

80

Hg

Mercury

200.59

2
8
18
32
18
2

81

Tl

Thallium

204.38

2
8
18
32
18
3

82

Pb

Lead

207.2

2
8
18
32
18
4

83

Bi

Bismuth

208.98

2
8
18
32
18
5

84

Po

Polonium

(209)

2
8
18
32
18
6

85

At

Astatine

(210)

2
8
18
32
18
7

86

Rn

Radon

(222)

2
8
18
32
18
8

87

Fr

Francium

(223)

2
8
18
32
18
8
1

88

Ra

Radium

(226)

2
8
18
32
18
8
2

89

Ac

Actinium

(227)

2
8
18
32
18
9
2

90

Th

Thorium

232.04

2
8
18
32
18
10
2

91

Pa

Protactinium

231.04

2
8
18
32
20
9
2

92

U

Uranium

238.03

2
8
18
32
21
9
2

93

Np

Neptunium

(237)

2
8
18
32
22
9
2

94

Pu

Plutonium

(244)

2
8
18
32
24
8
2

95

Am

Americium

(243)

2
8
18
32
25
8
2

96

Cm

Curium

(247)

2
8
18
32
25
9
2

97

Bk

Berkelium

(247)

2
8
18
32
27
8
2

98

Cf

Californium

(251)

2
8
18
32
28
8
2

99

Es

Einsteinium

(252)

2
8
18
32
29
8
2

100

Fm

Fermium

(257)

2
8
18
32
30
8
2

101

Md

Mendelevium

(258)

2
8
18
32
31
8
2

102

No

Nobelium

(259)

2
8
18
32
32
8
2

103

Lr

Lawrencium

(266)

2
8
18
32
32
8
3

104

Rf

Rutherfordium

(267)

2
8
18
32
32
10
2

105

Db

Dubnium

(268)

2
8
18
32
32
11
2

106

Sg

Seaborgium

(269)

2
8
18
32
32
12
2

107

Bh

Bohrium

(270)

2
8
18
32
32
13
2

108

Hs

Hassium

(277)

2
8
18
32
32
14
2

109

Mt

Meitnerium

(278)

2
8
18
32
32
15
2

110

Ds

Darmstadtium

(281)

2
8
18
32
32
17
1

111

Rg

Roentgenium

(282)

2
8
18
32
32
17
2

112

Cn

Copernicium

(282)

2
8
18
32
32
18
2

113

Nh

Nihonium

(286)

2
8
18
32
32
18
3

114

Fl

Flerovium

(289)

2
8
18
32
32
18
4

115

Mc

Moscovium

(290)

2
8
18
32
32
18
5

116

Lv

Livermorium

(293)

2
8
18
32
32
18
6

117

Ts

Tennessine

(294)

2
8
18
32
32
18
7

118

Og

Oganesson

(294)

2
8
18
32
32
18
8

57-71

89-103

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