1

1.008

1

H

Hydrogen

1.008

Atomic Weight

1

Atomic No.

H

Hydrogen

Atomic Name

Hydrogen

HI-dreh-jen

Gas

Atomic Weight:

1.0

Atomic Number:

1

Hexagonal

6.941

3

Li

Lithium

6.941

Atomic Weight

3

Atomic No.

Li

Lithium

Atomic Name

Lithium

LITH-i-em

Solid

Atomic Weight:

6.9

Atomic Number:

3

Cubic: Body centered

22.99

11

Na

Sodium

22.99

Atomic Weight

11

Atomic No.

Na

Sodium

Atomic Name

Sodium

SO-di-em

Solid

Atomic Weight:

23.0

Atomic Number:

11

Cubic: Body centered

39.098

19

K

Potassium

39.098

Atomic Weight

19

Atomic No.

K

Potassium

Atomic Name

Potassium

pe-TASS-i-em

Solid

Atomic Weight:

39.1

Atomic Number:

19

Cubic: Body centered

85.468

37

Rb

Rubidium

85.468

Atomic Weight

37

Atomic No.

Rb

Rubidium

Atomic Name

Rubidium

roo-BID-i-em

Solid

Atomic Weight:

85.5

Atomic Number:

37

Cubic: Body centered

132.905

55

Cs

Caesium

132.905

Atomic Weight

55

Atomic No.

Cs

Caesium

Atomic Name

Caesium

SEE-zi-em

Solid

Atomic Weight:

132.9

Atomic Number:

55

Cubic: Body centered

223

87

Fr

Francium

223

Atomic Weight

87

Atomic No.

Fr

Francium

Atomic Name

Francium

FRAN-si-em

Solid

Atomic Weight:

223.0

Atomic Number:

87

Cubic: Body centered

2

9.012

4

Be

Beryllium

9.012

Atomic Weight

4

Atomic No.

Be

Beryllium

Atomic Name

Beryllium

beh-RIL-i-em

Solid

Atomic Weight:

9.0

Atomic Number:

4

Hexagonal

24.305

12

Mg

Magnesium

24.305

Atomic Weight

12

Atomic No.

Mg

Magnesium

Atomic Name

Magnesium

mag-NEE-zih-em

Solid

Atomic Weight:

24.3

Atomic Number:

12

Hexagonal

40.078

20

Ca

Calcium

40.078

Atomic Weight

20

Atomic No.

Ca

Calcium

Atomic Name

Calcium

KAL-si-em

Solid

Atomic Weight:

40.1

Atomic Number:

20

Cubic: Face centered

87.62

38

Sr

Strontium

87.62

Atomic Weight

38

Atomic No.

Sr

Strontium

Atomic Name

Strontium

STRON-she-em

Solid

Atomic Weight:

87.6

Atomic Number:

38

Cubic: Face centered

137.327

56

Ba

Barium

137.327

Atomic Weight

56

Atomic No.

Ba

Barium

Atomic Name

Barium

BAR-i-em

Solid

Atomic Weight:

137.3

Atomic Number:

56

Cubic: Body centered

226

88

Ra

Radium

226

Atomic Weight

88

Atomic No.

Ra

Radium

Atomic Name

Radium

RAY-di-em

Solid

Atomic Weight:

226.0

Atomic Number:

88

Cubic: Body centered

3

44.956

21

Sc

Scandium

44.956

Atomic Weight

21

Atomic No.

Sc

Scandium

Atomic Name

Scandium

SKAN-di-em

Solid

Atomic Weight:

45.0

Atomic Number:

21

Hexagonal

88.906

39

Y

Yttrium

88.906

Atomic Weight

39

Atomic No.

Y

Yttrium

Atomic Name

Yttrium

IT-ri-em

Solid

Atomic Weight:

88.9

Atomic Number:

39

Hexagonal

4

5

6

7

8

9

10

11

12

47.867

22

Ti

Titanium

47.867

Atomic Weight

22

Atomic No.

Ti

Titanium

Atomic Name

Titanium

tie-TAY-ni-em

Solid

Atomic Weight:

47.9

Atomic Number:

22

Hexagonal

50.942

23

V

Vanadium

50.942

Atomic Weight

23

Atomic No.

V

Vanadium

Atomic Name

Vanadium

veh-NAY-di-em

Solid

Atomic Weight:

50.9

Atomic Number:

23

Cubic: Body centered

51.996

24

Cr

Chromium

51.996

Atomic Weight

24

Atomic No.

Cr

Chromium

Atomic Name

Chromium

KROH-mi-em

Solid

Atomic Weight:

52.0

Atomic Number:

24

Cubic: Body centered

54.938

25

Mn

Manganese

54.938

Atomic Weight

25

Atomic No.

Mn

Manganese

Atomic Name

Manganese

MAN-ge-nees

Solid

Atomic Weight:

54.9

Atomic Number:

25

Cubic: Body centered

55.845

26

Fe

Iron

55.845

Atomic Weight

26

Atomic No.

Fe

Iron

Atomic Name

Iron

EYE-ern

Solid

Atomic Weight:

55.8

Atomic Number:

26

Cubic: Body centered

58.933

27

Co

Cobalt

58.933

Atomic Weight

27

Atomic No.

Co

Cobalt

Atomic Name

Cobalt

KO-bolt

Solid

Atomic Weight:

58.9

Atomic Number:

27

Hexagonal

58.693

28

Ni

Nickel

58.693

Atomic Weight

28

Atomic No.

Ni

Nickel

Atomic Name

Nickel

NIK-l

Solid

Atomic Weight:

58.7

Atomic Number:

28

Cubic: Face centered

63.546

29

Cu

Copper

63.546

Atomic Weight

29

Atomic No.

Cu

Copper

Atomic Name

Copper

KOP-er

Solid

Atomic Weight:

63.5

Atomic Number:

29

Cubic: Face centered

65.38

30

Zn

Zinc

65.38

Atomic Weight

30

Atomic No.

Zn

Zinc

Atomic Name

Zinc

ZINK

Solid

Atomic Weight:

65.4

Atomic Number:

30

Hexagonal

91.224

40

Zr

Zirconium

91.224

Atomic Weight

40

Atomic No.

Zr

Zirconium

Atomic Name

Zirconium

zer-KO-ni-em

Solid

Atomic Weight:

91.2

Atomic Number:

40

Hexagonal

92.906

41

Nb

Niobium

92.906

Atomic Weight

41

Atomic No.

Nb

Niobium

Atomic Name

Niobium

ni-OH-bee-em

Solid

Atomic Weight:

92.9

Atomic Number:

41

Cubic: Body centered

95.95

42

Mo

Molybdenum

95.95

Atomic Weight

42

Atomic No.

Mo

Molybdenum

Atomic Name

Molybdenum

meh-LIB-deh-nem

Solid

Atomic Weight:

96.0

Atomic Number:

42

Cubic: Body centered

97

43

Tc

Technetium

97

Atomic Weight

43

Atomic No.

Tc

Technetium

Atomic Name

Technetium

tek-NEE-shi-em

Solid

Atomic Weight:

97.0

Atomic Number:

43

Hexagonal

101.07

44

Ru

Ruthenium

101.07

Atomic Weight

44

Atomic No.

Ru

Ruthenium

Atomic Name

Ruthenium

roo-THE-ni-em

Solid

Atomic Weight:

101.1

Atomic Number:

44

Hexagonal

102.905

45

Rh

Rhodium

102.905

Atomic Weight

45

Atomic No.

Rh

Rhodium

Atomic Name

Rhodium

RO-di-em

Solid

Atomic Weight:

102.9

Atomic Number:

45

Cubic: Face centered

106.42

46

Pd

Palladium

106.42

Atomic Weight

46

Atomic No.

Pd

Palladium

Atomic Name

Palladium

peh-LAY-di-em

Solid

Atomic Weight:

106.4

Atomic Number:

46

Cubic: Face centered

107.868

47

Ag

Silver

107.868

Atomic Weight

47

Atomic No.

Ag

Silver

Atomic Name

Silver

SIL-ver

Solid

Atomic Weight:

107.9

Atomic Number:

47

Cubic: Face centered

112.414

48

Cd

Cadmium

112.414

Atomic Weight

48

Atomic No.

Cd

Cadmium

Atomic Name

Cadmium

KAD-me-em

Solid

Atomic Weight:

112.4

Atomic Number:

48

Hexagonal

178.49

72

Hf

Hafnium

178.49

Atomic Weight

72

Atomic No.

Hf

Hafnium

Atomic Name

Hafnium

HAF-ni-em

Solid

Atomic Weight:

178.5

Atomic Number:

72

Hexagonal

180.948

73

Ta

Tantalum

180.948

Atomic Weight

73

Atomic No.

Ta

Tantalum

Atomic Name

Tantalum

TAN-te-lem

Solid

Atomic Weight:

180.9

Atomic Number:

73

Cubic: Body centered

183.84

74

W

Tungsten

183.84

Atomic Weight

74

Atomic No.

W

Tungsten

Atomic Name

Tungsten

TUNG-sten

Solid

Atomic Weight:

183.8

Atomic Number:

74

Cubic: Body centered

186.207

75

Re

Rhenium

186.207

Atomic Weight

75

Atomic No.

Re

Rhenium

Atomic Name

Rhenium

REE-ni-em

Solid

Atomic Weight:

186.2

Atomic Number:

75

Hexagonal

190.23

76

Os

Osmium

190.23

Atomic Weight

76

Atomic No.

Os

Osmium

Atomic Name

Osmium

OZ-mi-em

Solid

Atomic Weight:

190.2

Atomic Number:

76

Hexagonal

192.217

77

Ir

Iridium

192.217

Atomic Weight

77

Atomic No.

Ir

Iridium

Atomic Name

Iridium

i-RID-i-em

Solid

Atomic Weight:

192.2

Atomic Number:

77

Cubic: Face centered

195.084

78

Pt

Platinum

195.084

Atomic Weight

78

Atomic No.

Pt

Platinum

Atomic Name

Platinum

PLAT-n-em

Solid

Atomic Weight:

195.1

Atomic Number:

78

Cubic: Face centered

196.967

79

Au

Gold

196.967

Atomic Weight

79

Atomic No.

Au

Gold

Atomic Name

Gold

GOLD

Solid

Atomic Weight:

197.0

Atomic Number:

79

Cubic: Face centered

200.592

80

Hg

Mercury

200.592

Atomic Weight

80

Atomic No.

Hg

Mercury

Atomic Name

Mercury

MER-kyoo-ri

Liquid

Atomic Weight:

200.6

Atomic Number:

80

Rhombohedral

267

104

Rf

Rutherfordium

267

Atomic Weight

104

Atomic No.

Rf

Rutherfordium

Atomic Name

Rutherfordium

ruth-er-FORD-i-em

Unknown

Atomic Weight:

267.0

Atomic Number:

104

Unknown

270

105

Db

Dubnium

270

Atomic Weight

105

Atomic No.

Db

Dubnium

Atomic Name

Dubnium

HA-ni-em

Unknown

Atomic Weight:

270.0

Atomic Number:

105

Unknown

269

106

Sg

Seaborgium

269

Atomic Weight

106

Atomic No.

Sg

Seaborgium

Atomic Name

Seaborgium

see-BORG-i-em

Unknown

Atomic Weight:

269.0

Atomic Number:

106

Unknown

270

107

Bh

Bohrium

270

Atomic Weight

107

Atomic No.

Bh

Bohrium

Atomic Name

Bohrium

neels-BOR-i-em

Unknown

Atomic Weight:

270.0

Atomic Number:

107

Unknown

270

108

Hs

Hassium

270

Atomic Weight

108

Atomic No.

Hs

Hassium

Atomic Name

Hassium

HES-i-em

Unknown

Atomic Weight:

270.0

Atomic Number:

108

Unknown

278

109

Mt

Meitnerium

278

Atomic Weight

109

Atomic No.

Mt

Meitnerium

Atomic Name

Meitnerium

MITE-ner-i-um

Unknown

Atomic Weight:

278.0

Atomic Number:

109

Unknown

281

110

Ds

Darmstadtium

281

Atomic Weight

110

Atomic No.

Ds

Darmstadtium

Atomic Name

Darmstadtium

oon-nun-NIL-i-em

Unknown

Atomic Weight:

281.0

Atomic Number:

110

Unknown

281

111

Rg

Roentgenium

281

Atomic Weight

111

Atomic No.

Rg

Roentgenium

Atomic Name

Roentgenium

oon-nun-OON-i-em

Unknown

Atomic Weight:

281.0

Atomic Number:

111

Unknown

285

112

Cn

Copernicium

285

Atomic Weight

112

Atomic No.

Cn

Copernicium

Atomic Name

Copernicium

KOH-pər-NIS-ee-əm

Unknown

Atomic Weight:

285.0

Atomic Number:

112

Unknown

13

14

15

16

17

10.811

5

B

Boron

10.811

Atomic Weight

5

Atomic No.

B

Boron

Atomic Name

Boron

BO-ron

Solid

Atomic Weight:

10.8

Atomic Number:

5

Rhombohedral

12.011

6

C

Carbon

12.011

Atomic Weight

6

Atomic No.

C

Carbon

Atomic Name

Carbon

KAR-ben

Solid

Atomic Weight:

12.0

Atomic Number:

6

Hexagonal

14.007

7

N

Nitrogen

14.007

Atomic Weight

7

Atomic No.

N

Nitrogen

Atomic Name

Nitrogen

NYE-treh-gen

Gas

Atomic Weight:

14.0

Atomic Number:

7

Hexagonal

15.999

8

O

Oxygen

15.999

Atomic Weight

8

Atomic No.

O

Oxygen

Atomic Name

Oxygen

OK-si-jen

Gas

Atomic Weight:

16.0

Atomic Number:

8

Cubic

18.998

9

F

Fluorine

18.998

Atomic Weight

9

Atomic No.

F

Fluorine

Atomic Name

Fluorine

FLU-eh-reen

Gas

Atomic Weight:

19.0

Atomic Number:

9

Cubic

26.982

13

Al

Aluminium

26.982

Atomic Weight

13

Atomic No.

Al

Aluminium

Atomic Name

Aluminium

ah-LOO-men-em

Solid

Atomic Weight:

27.0

Atomic Number:

13

Cubic: Face centered

28.085

14

Si

Silicon

28.085

Atomic Weight

14

Atomic No.

Si

Silicon

Atomic Name

Silicon

SIL-i-ken

Solid

Atomic Weight:

28.1

Atomic Number:

14

Cubic: Face centered

30.974

15

P

Phosphorus

30.974

Atomic Weight

15

Atomic No.

P

Phosphorus

Atomic Name

Phosphorus

FOS-fer-es

Solid

Atomic Weight:

31.0

Atomic Number:

15

Cubic

32.06

16

S

Sulphur

32.06

Atomic Weight

16

Atomic No.

S

Sulphur

Atomic Name

Sulphur

SUL-fer

Solid

Atomic Weight:

32.1

Atomic Number:

16

Orthorhombic

35.453

17

Cl

Chlorine

35.453

Atomic Weight

17

Atomic No.

Cl

Chlorine

Atomic Name

Chlorine

KLOR-een

Gas

Atomic Weight:

35.5

Atomic Number:

17

Orthorhombic

69.723

31

Ga

Gallium

69.723

Atomic Weight

31

Atomic No.

Ga

Gallium

Atomic Name

Gallium

GAL-i-em

Solid

Atomic Weight:

69.7

Atomic Number:

31

Orthorhombic

72.63

32

Ge

Germanium

72.63

Atomic Weight

32

Atomic No.

Ge

Germanium

Atomic Name

Germanium

jer-MAY-ni-em

Solid

Atomic Weight:

72.6

Atomic Number:

32

Cubic: Face centered

74.922

33

As

Arsenic

74.922

Atomic Weight

33

Atomic No.

As

Arsenic

Atomic Name

Arsenic

AR-s'n-ik

Solid

Atomic Weight:

74.9

Atomic Number:

33

Rhombohedral

78.971

34

Se

Selenium

78.971

Atomic Weight

34

Atomic No.

Se

Selenium

Atomic Name

Selenium

si-LEE-ni-em

Solid

Atomic Weight:

79.0

Atomic Number:

34

Hexagonal

79.904

35

Br

Bromine

79.904

Atomic Weight

35

Atomic No.

Br

Bromine

Atomic Name

Bromine

BRO-meen

Liquid

Atomic Weight:

79.9

Atomic Number:

35

Orthorhombic

114.818

49

In

Indium

114.818

Atomic Weight

49

Atomic No.

In

Indium

Atomic Name

Indium

IN-di-em

Solid

Atomic Weight:

114.8

Atomic Number:

49

Tetragonal

118.71

50

Sn

Tin

118.71

Atomic Weight

50

Atomic No.

Sn

Tin

Atomic Name

Tin

TIN

Solid

Atomic Weight:

118.7

Atomic Number:

50

Tetragonal

121.76

51

Sb

Antimony

121.76

Atomic Weight

51

Atomic No.

Sb

Antimony

Atomic Name

Antimony

AN-teh-MOH-ni

Solid

Atomic Weight:

121.8

Atomic Number:

51

Rhombohedral

127.6

52

Te

Tellurium

127.6

Atomic Weight

52

Atomic No.

Te

Tellurium

Atomic Name

Tellurium

te-LOOR-i-em

Solid

Atomic Weight:

127.6

Atomic Number:

52

Hexagonal

126.904

53

I

Iodine

126.904

Atomic Weight

53

Atomic No.

I

Iodine

Atomic Name

Iodine

EYE-eh-dine

Solid

Atomic Weight:

126.9

Atomic Number:

53

Orthorhombic

204.38

81

Tl

Thallium

204.38

Atomic Weight

81

Atomic No.

Tl

Thallium

Atomic Name

Thallium

THAL-i-em

Solid

Atomic Weight:

204.4

Atomic Number:

81

Hexagonal

207.2

82

Pb

Lead

207.2

Atomic Weight

82

Atomic No.

Pb

Lead

Atomic Name

Lead

LED

Solid

Atomic Weight:

207.2

Atomic Number:

82

Cubic: Face centered

208.98

83

Bi

Bismuth

208.98

Atomic Weight

83

Atomic No.

Bi

Bismuth

Atomic Name

Bismuth

BIZ-meth

Solid

Atomic Weight:

209.0

Atomic Number:

83

Rhombohedral

209

84

Po

Polonium

209

Atomic Weight

84

Atomic No.

Po

Polonium

Atomic Name

Polonium

peh-LOW-ni-em

Solid

Atomic Weight:

209.0

Atomic Number:

84

Monoclinic

210

85

At

Astatine

210

Atomic Weight

85

Atomic No.

At

Astatine

Atomic Name

Astatine

AS-teh-teen

Solid

Atomic Weight:

210.0

Atomic Number:

85

Unknown

286

113

Nh

Nihonium

286

Atomic Weight

113

Atomic No.

Nh

Nihonium

Atomic Name

Nihonium

nih-HOH-nee-əm

Unknown

Atomic Weight:

286.0

Atomic Number:

113

Unknown

289

114

Fl

Flerovium

289

Atomic Weight

114

Atomic No.

Fl

Flerovium

Atomic Name

Flerovium

flə-ROH-vee-əm

Unknown

Atomic Weight:

289.0

Atomic Number:

114

Unknown

289

115

Mc

Moscovium

289

Atomic Weight

115

Atomic No.

Mc

Moscovium

Atomic Name

Moscovium

mos-KOH-vee-əm

Unknown

Atomic Weight:

289.0

Atomic Number:

115

Unknown

293

116

Lv

Livermorium

293

Atomic Weight

116

Atomic No.

Lv

Livermorium

Atomic Name

Livermorium

LIV-ər-MOHR-ee-əm

Unknown

Atomic Weight:

293.0

Atomic Number:

116

Unknown

293

117

Ts

Tennessine

293

Atomic Weight

117

Atomic No.

Ts

Tennessine

Atomic Name

Tennessine

TEN-ə-seen

Unknown

Atomic Weight:

293.0

Atomic Number:

117

Unknown

18

4.003

2

He

Helium

4.003

Atomic Weight

2

Atomic No.

He

Helium

Atomic Name

Helium

HEE-li-em

Gas

Atomic Weight:

4.0

Atomic Number:

2

Hexagonal

20.18

10

Ne

Neon

20.18

Atomic Weight

10

Atomic No.

Ne

Neon

Atomic Name

Neon

NEE-on

Gas

Atomic Weight:

20.2

Atomic Number:

10

Cubic: Face centered

39.948

18

Ar

Argon

39.948

Atomic Weight

18

Atomic No.

Ar

Argon

Atomic Name

Argon

AR-gon

Gas

Atomic Weight:

39.9

Atomic Number:

18

Cubic: Face centered

83.798

36

Kr

Krypton

83.798

Atomic Weight

36

Atomic No.

Kr

Krypton

Atomic Name

Krypton

KRIP-ton

Gas

Atomic Weight:

83.8

Atomic Number:

36

Cubic: Face centered

131.293

54

Xe

Xenon

131.293

Atomic Weight

54

Atomic No.

Xe

Xenon

Atomic Name

Xenon

ZEE-non

Gas

Atomic Weight:

131.3

Atomic Number:

54

Cubic: Face centered

222

86

Rn

Radon

222

Atomic Weight

86

Atomic No.

Rn

Radon

Atomic Name

Radon

RAY-don

Gas

Atomic Weight:

222.0

Atomic Number:

86

Cubic: Face centered

294

118

Og

Oganesson

294

Atomic Weight

118

Atomic No.

Og

Oganesson

Atomic Name

Oganesson

OH-gə-NES-on

Gas

Atomic Weight:

294.0

Atomic Number:

118

Unknown

138.905

57

La

Lanthanum

138.905

Atomic Weight

57

Atomic No.

La

Lanthanum

Atomic Name

Lanthanum

LAN-the-nem

Solid

Atomic Weight:

138.9

Atomic Number:

57

Hexagonal

140.116

58

Ce

Cerium

140.116

Atomic Weight

58

Atomic No.

Ce

Cerium

Atomic Name

Cerium

SER-i-em

Solid

Atomic Weight:

140.1

Atomic Number:

58

Cubic: Face centered

140.908

59

Pr

Praseodymium

140.908

Atomic Weight

59

Atomic No.

Pr

Praseodymium

Atomic Name

Praseodymium

pra-si-eh-DIM-i-em

Solid

Atomic Weight:

140.9

Atomic Number:

59

Hexagonal

144.24

60

Nd

Neodymium

144.24

Atomic Weight

60

Atomic No.

Nd

Neodymium

Atomic Name

Neodymium

nee-eh-DIM-i-em

Solid

Atomic Weight:

144.2

Atomic Number:

60

Hexagonal

145

61

Pm

Promethium

145

Atomic Weight

61

Atomic No.

Pm

Promethium

Atomic Name

Promethium

pro-MEE-thi-em

Solid

Atomic Weight:

145.0

Atomic Number:

61

Hexagonal

150.36

62

Sm

Samarium

150.36

Atomic Weight

62

Atomic No.

Sm

Samarium

Atomic Name

Samarium

seh-MER-i-em

Solid

Atomic Weight:

150.4

Atomic Number:

62

Rhombohedral

151.964

63

Eu

Europium

151.964

Atomic Weight

63

Atomic No.

Eu

Europium

Atomic Name

Europium

yoo-RO-pi-em

Solid

Atomic Weight:

152.0

Atomic Number:

63

Cubic: Body centered

157.25

64

Gd

Gadolinium

157.25

Atomic Weight

64

Atomic No.

Gd

Gadolinium

Atomic Name

Gadolinium

GAD-eh-LIN-i-em

Solid

Atomic Weight:

157.3

Atomic Number:

64

Hexagonal

158.925

65

Tb

Terbium

158.925

Atomic Weight

65

Atomic No.

Tb

Terbium

Atomic Name

Terbium

TUR-bi-em

Solid

Atomic Weight:

158.9

Atomic Number:

65

Hexagonal

162.5

66

Dy

Dysprosium

162.5

Atomic Weight

66

Atomic No.

Dy

Dysprosium

Atomic Name

Dysprosium

dis-PRO-si-em

Solid

Atomic Weight:

162.5

Atomic Number:

66

Hexagonal

164.93

67

Ho

Holmium

164.93

Atomic Weight

67

Atomic No.

Ho

Holmium

Atomic Name

Holmium

HOLE-mi-em

Solid

Atomic Weight:

164.9

Atomic Number:

67

Hexagonal

167.259

68

Er

Erbium

167.259

Atomic Weight

68

Atomic No.

Er

Erbium

Atomic Name

Erbium

UR-bi-em

Solid

Atomic Weight:

167.3

Atomic Number:

68

Hexagonal

168.934

69

Tm

Thulium

168.934

Atomic Weight

69

Atomic No.

Tm

Thulium

Atomic Name

Thulium

THOO-li-em

Solid

Atomic Weight:

168.9

Atomic Number:

69

Hexagonal

173.045

70

Yb

Ytterbium

173.045

Atomic Weight

70

Atomic No.

Yb

Ytterbium

Atomic Name

Ytterbium

i-TUR-bi-em

Solid

Atomic Weight:

173.0

Atomic Number:

70

Cubic: Face centered

174.967

71

Lu

Lutetium

174.967

Atomic Weight

71

Atomic No.

Lu

Lutetium

Atomic Name

Lutetium

loo-TEE-shi-em

Solid

Atomic Weight:

175.0

Atomic Number:

71

Hexagonal

227

89

Ac

Actinium

227

Atomic Weight

89

Atomic No.

Ac

Actinium

Atomic Name

Actinium

ak-TIN-i-em

Solid

Atomic Weight:

227.0

Atomic Number:

89

Cubic: Face centered

232.038

90

Th

Thorium

232.038

Atomic Weight

90

Atomic No.

Th

Thorium

Atomic Name

Thorium

THOR-i-em

Solid

Atomic Weight:

232.0

Atomic Number:

90

Cubic: Face centered

231.036

91

Pa

Protactinium

231.036

Atomic Weight

91

Atomic No.

Pa

Protactinium

Atomic Name

Protactinium

PRO-tak-tin-eh-em

Solid

Atomic Weight:

231.0

Atomic Number:

91

Orthorhombic

238.029

92

U

Uranium

238.029

Atomic Weight

92

Atomic No.

U

Uranium

Atomic Name

Uranium

yoo-RAY-ni-em

Solid

Atomic Weight:

238.0

Atomic Number:

92

Orthorhombic

237

93

Np

Neptunium

237

Atomic Weight

93

Atomic No.

Np

Neptunium

Atomic Name

Neptunium

nep-TOO-ni-em

Solid

Atomic Weight:

237.0

Atomic Number:

93

Orthorhombic

244

94

Pu

Plutonium

244

Atomic Weight

94

Atomic No.

Pu

Plutonium

Atomic Name

Plutonium

ploo-TOE-ni-em

Solid

Atomic Weight:

244.0

Atomic Number:

94

Monoclinic

243

95

Am

Americium

243

Atomic Weight

95

Atomic No.

Am

Americium

Atomic Name

Americium

am-er-ISH-i-em

Solid

Atomic Weight:

243.0

Atomic Number:

95

Hexagonal

247

96

Cm

Curium

247

Atomic Weight

96

Atomic No.

Cm

Curium

Atomic Name

Curium

KYOOR-i-em

Solid

Atomic Weight:

247.0

Atomic Number:

96

Hexagonal

247

97

Bk

Berkelium

247

Atomic Weight

97

Atomic No.

Bk

Berkelium

Atomic Name

Berkelium

BURK-li-em

Solid

Atomic Weight:

247.0

Atomic Number:

97

Unknown

251

98

Cf

Californium

251

Atomic Weight

98

Atomic No.

Cf

Californium

Atomic Name

Californium

kal-eh-FOR-ni-em

Solid

Atomic Weight:

251.0

Atomic Number:

98

Unknown

252

99

Es

Einsteinium

252

Atomic Weight

99

Atomic No.

Es

Einsteinium

Atomic Name

Einsteinium

ine-STINE-i-em

Solid

Atomic Weight:

252.0

Atomic Number:

99

Unknown

257

100

Fm

Fermium

257

Atomic Weight

100

Atomic No.

Fm

Fermium

Atomic Name

Fermium

FER-mi-em

Solid

Atomic Weight:

257.0

Atomic Number:

100

Unknown

258

101

Md

Mendelevium

258

Atomic Weight

101

Atomic No.

Md

Mendelevium

Atomic Name

Mendelevium

men-deh-LEE-vi-em

Solid

Atomic Weight:

258.0

Atomic Number:

101

Unknown

259

102

No

Nobelium

259

Atomic Weight

102

Atomic No.

No

Nobelium

Atomic Name

Nobelium

no-BELL-i-em

Solid

Atomic Weight:

259.0

Atomic Number:

102

Unknown

262

103

Lr

Lawrencium

262

Atomic Weight

103

Atomic No.

Lr

Lawrencium

Atomic Name

Lawrencium

lor-ENS-i-em

Solid

Atomic Weight:

262.0

Atomic Number:

103

Unknown

1234

Atomic Weight

1234

Atomic No.

x

45

Atomic Name

Heading

Understanding the Periodic Table

Learn How to Read the Periodic Table

Periods

Left to Right ⇆

Periods are the rows of the periodic table that from left to right increase in order of mass. As you go along periods the number of protons and neutrons increases and the number of electron shells remains the same.

1

2

3

4

5

6

7

Groups

Top to bottom ⇅

Groups are the columns of the periodic table with elements that are grouped together with similar properties.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Learn The Easy Way

Learn the periodic table through easy to follow courses

Shielding of the Nucleus

Density of Elements

Common Groups and Periods of the Periodic Table

Reactivity of Elements of the Periodic Table

History of Chemistry: Alchemy Symbols

State Changes of Elements

The Origins of the Periodic Table

Bond Strength

Electronegativity of the Elements

Evolution of the Atom

The Structure and Meaning of the Periodic Table: Periods

Who uses the Periodic Table?

Shielding

Atomic Number of the Elements

Atoms Elements Molecules and Compounds

The History of the Atomic Model: Heisenberg’s uncertainty principle

The Atomic Structure in the Periodic Table

Advanced Electron Configuration

Group 17: The Halogens

Chemical Properties

Physical Properties of Substances

The Transition Metals

Electron Affinity of The Elements

Intermolecular Forces in Covalent Compounds

Ionic Properties

Why is the Periodic Table so Important?

The History of the Atomic Model: Rutherford and Bohr

Covalent Bonding

History of Chemistry: Alchemy

The Chemistry of Transition Metal

Alchemy and Modern Chemistry

Giant Covalent Compounds

Group 18: The Noble Gases

Chemical Properties of Substances

The History of the Atomic Model: Chadwick and the Neutron

Can Elements Be Made in the Lab?

Beginner Track

Novice Track

Expert Track

Looking to find an element?