IIIB IVB VB VIB VIIB VIIIB IB IIB IIIA IVA VA VIA VIIA VIIIA

Atomic Masses (amu)

IA

1

1

2

3

4

5

6

7

IIA

2

IIIB

3

IVB

4

VB

5

VIB

6

VIIB

7

VIIIB

8

VIIIB

9

VIIIB

10

IB

11

IIB

12

IIIA

13

IVA

14

VA

15

VIA

16

VIIA

17

VIIIA

18

2

1

H

He

1.008

4.003

3

4

5

6

7

8

9

10

Li

Be

B

C

N

O

F

6.941

9.012

10.81

12.01

14.01

16.00

19.00

20.18

22.99

24.31

26.98

28.09

30.97

32.07

35.45

39.95

39.10

40.08

44.96

85.47

87.62

132.91

223.02

11

Na

19

K

37

Rb

55

Cs

87

Fr

12

13

Mg

20

Ca

Al

21

22

24

25

26

27

Cr

Mn

Fe

Co

47.87

50.94

52.00

54.94

55.85

88.91

91.22

92.91

95.94

97.91

137.33

138.91

178.49

180.95

183.84

226.03

227.03

261.11

262.11

58

59

Sr

56

Ba

88

Ra

6

7

39

Y

57

La

89

Ac

Ti

23

V

38

Sc

40

Zr

72

Hf

104

Rf

41

Nb

73

Ta

105

Db

28

29

30

31

Si

32

P

33

S

34

Cl

35

63.55

65.41

69.72

72.64

74.92

78.96

79.90

83.80

101.07

102.91

106.42

107.87

112.41

114.82

118.71

121.76

127.60

126.90

131.29

186.21

190.23

192.22

195.08

196.97

200.59

204.38

207.21

208.98

208.98

209.99

222.02

266.12

264.12

269.13

268.24

271

272

275

60

61

62

63

67

68

69

70

71

Mo

74

W

106

Sg

Tc

75

Re

107

Bh

Ru

76

Os

108

Hs

Rh

77

Ir

109

Mt

Pd

78

Pt

110

Ds

64

47

Ag

79

Au

111

Rg

65

48

Cd

80

Hg

112

Cn

66

49

In

81

Tl

50

Sn

82

Pb

51

Sb

83

Bi

52

Te

84

Po

53

I

85

At

Ce

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

140.12

140.91

144.24

144.91

150.36

151.96

157.25

158.93

162.50

164.93

167.26

168.93

173.04

174.97

232.04

231.04

238.03

237.05

244.06

243.06

247.07

247.07

251.08

252.08

257.10

258.10

259.10

262.11

90

Th

91

Pa

36

58.69

46

Br

18

Ar

58.93

45

Se

17

Zn

44

As

16

Cu

43

Ge

15

Ni

42

Ga

14

Ne

92

U

93

Np

94

Pu

95

Am

96

Cm

97

Bk

98

Cf

99

Es

100

Fm

101

Md

102

No

103

Lr

Kr

54

Xe

86

Rn

Element Names

IA

1

1

2

3

4

5

6

7

IIA

2

IIIB

3

IVB

4

VB

5

VIB

6

VIIB

7

VIIIB

8

VIIIB

9

VIIIB

10

IB

11

IIB

12

IIIA

13

IVA

14

VA

15

VIA

16

VIIA

17

1

VIIIA

18

2

H

He

hydrogen

helium

3

4

5

6

7

8

9

10

Cl

Ar

chlorine

argon

Li

Be

B

C

N

O

F

Ne

lithium

beryllium

boron

carbon

nitrogen

oxygen

fluorine

neon

12

13

14

15

16

17

11

Na

Mg

sodium

magnesium

19

20

Al

aluminum

21

K

Ca

potassium

calcium

scandium

37

38

39

Rb

Sr

Sc

22

Ti

23

24

Fe

Co

chromium

25

manganese

iron

42

43

44

V

Cr

Mn

titanium

vanadium

40

41

26

27

28

Ge

As

Se

Br

Kr

nickel

copper

zinc

gallium

germanium

arsenic

selenium

bromine

krypton

46

47

48

49

50

Sn

Sb

Te

tin

51

antimony

52

53

54

82

83

45

Y

Zr

Nb

Mo

Tc

Ru

Rh

Pd

Ag

Cd

In

33

sulfur

34

35

18

Ga

cobalt

32

phosphorus

S

Zn

Cu

31

silicon

P

29

Ni

30

Si

36

I

Xe

tellurium

iodine

xenon

84

85

86

rubidium

strontium

yttrium

zirconium

niobium

molybdenum

technetium

ruthenium

rhodium

palladium

silver

cadmium

indium

55

56

57

72

73

74

75

76

77

78

79

80

81

Tl

Pb

Bi

Po

At

Rn

thallium

lead

bismuth

polonium

astatine

radon

67

68

69

70

71

Cs

Ba

La

Hf

Ta

W

Re

Os

Pt

Au

Hg

cesium

barium

lanthanum

hafnium

tantalum

tungsten

rhenium

osmium

iridium

platinum

gold

mercury

87

88

89

104

105

106

107

108

109

110

111

112

Fr

Ra

Ac

francium

radium

actinium

6

7

Rf

Db

Sg

Bh

Hs

Ir

Mt

Ds

Rg

Cn

rutherfordium

dubnium

seaborgium

bohrium

hassium

meitnerium

darmstadtium

roentgenium

copernicium

58

59

60

61

62

63

64

65

66

Ce

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

cerium

praseodymium

neodymium

promethium

samarium

europium

gadolinium

terbium

dysprosium

holmium

erbium

thulium

ytterbium

lutetium

90

91

92

93

94

95

96

97

98

99

100

101

102

103

Th

Pa

thorium

protactinium

U

Np

Pu

Am

Cm

Bk

uranium

neptunium

plutonium

americium

curium

berkelium

Cf

Es

californium

einsteinium

Fm

fermium

Md

mendelevium

No

nobelium

Lr

lawrencium

Classification of the Elements

IA

1

1

2

3

4

5

6

7

IIA

2

IIIB

3

IVB

4

VB

5

VIB

6

VIIB

7

VIIIB

8

VIIIB

9

VIIIB

10

IB

11

IIB

12

IIIA

13

IVA

14

VA

15

VIA

16

VIIA

17

1

VIIIA

18

2

H

He

non-metal

non-metal

3

4

5

6

7

8

9

10

Li

Be

B

C

N

O

F

Ne

metallic

metallic

metalloid

non-metal

non-metal

non-metal

non-metal

non-metal

12

13

14

15

16

17

11

Na

Mg

metallic

metallic

19

20

Al

metallic

21

K

Ca

metallic

metallic

metallic

37

38

39

Rb

Sr

Sc

22

Ti

23

24

25

26

27

V

Cr

Mn

Fe

Co

metallic

metallic

metallic

metallic

metallic

40

41

42

43

44

28

29

30

31

Si

metalloid

32

P

non-metal

33

S

non-metal

34

18

Cl

Ar

non-metal

non-metal

35

36

Ni

Cu

Zn

Ga

Ge

As

Se

Br

Kr

metallic

metallic

metallic

metallic

metallic

metalloid

metalloid

non-metal

non-metal

non-metal

45

46

47

48

49

50

51

52

53

54

Y

Zr

Nb

Mo

Tc

Ru

Rh

Pd

Ag

Cd

In

Sn

Sb

Te

I

Xe

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metalloid

metalloid

non-metal

non-metal

55

56

57

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

Cs

Ba

La

Hf

Ta

W

Re

Os

Pt

Au

Hg

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

87

88

89

104

105

106

107

108

109

110

111

112

Fr

Ra

Ac

metallic

metallic

metallic

6

7

Rf

Db

Sg

Bh

Hs

Ir

Mt

Ds

Rg

Tl

Pb

Bi

Po

At

Rn

metallic

metallic

metallic

metallic

non-metal

non-metal

67

68

69

70

71

Cn

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

58

59

60

61

62

63

64

65

66

Ce

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

metallic

90

91

92

93

94

95

96

97

98

99

100

101

102

103

Th

Pa

metallic

metallic

U

Np

Pu

Am

Cm

Bk

metallic

metallic

metallic

metallic

metallic

metallic

Cf

Es

metallic

metallic

Fm

metallic

Md

metallic

No

metallic

Lr

metallic

Group (Family) Names

IA

1

IIA

2

IIIB

3

IVB

4

VB

5

VIB

6

VIIB

7

VIIIB

8

VIIIB

9

VIIIB

10

IB

11

IIB

12

IIIA

13

IVA

14

VA

15

VIA

16

VIIA

17

1

2

1

H

2

3

Li

3

Na

11

Mg

4

19

K

Ca

20

21

Sc

22

Ti

23

V

Cr

24

Mn

25

Fe

26

Co

27

28

Ni

Cu

29

Zn

30

5

37

Rb

38

Sr

39

Y

40

Zr

41

Nb

42

Mo

43

Tc

44

Ru

45

Rh

46

Pd

47

6

55

Cs

56

Ba

57

La

72

Hf

73

Ta

74

W

75

Re

76

Os

77

Ir

78

7

87

88

89

104

105

106

107

108

109

He

4

Be

5

B

6

C

7

N

8

O

9

F

Ne

12

13

Al

14

Si

15

P

16

S

17

Cl

Ar

Ga

31

Ge

32

As

33

Se

34

Br

35

Kr

Ag

48

Cd

49

In

50

Sn

51

Sb

52

Te

53

I

54

Xe

Pt

79

Au

80

Hg

81

82

83

84

85

86

110

111

112

Rn

Pm

Sm

Eu

64

Gd

65

Tb

66

Dy

67

Ho

68

Er

69

Tm

70

Yb

Lu

7

90

91

92

93

94

95

96

97

98

99

100

101

102

103

earth metals

group 2: alkaline

Hs

Mt

Ds

Rg

Cn

groups 3-12: outer transition metals

group 16: oxygen

Nd

63

Bh

(chalcogen) family

Pr

62

Sg

(pnictogen) family

Ce

61

Db

group 15: nitrogen

6

60

Rf

lanthanoid and actinoid series: inner transition metals

Th

Pa

U

Np

Pu

Am

Cm

Bk

Cf

Es

Fm

Md

No

36

At

59

Ac

18

group 18: noble gas family

Po

10

group 17: halogen family

Bi

group 14: carbon family

Pb

group 13: boron family

Tl

58

Ra

(except H)

metals

Fr

group 1: alkali

VIIIA

18

71

Lr

Electronegativity (Pauling)

IA

1

1

2

3

4

5

6

7

IIA

2

IIIB

3

IVB

4

VB

5

VIB

6

VIIB

7

VIIIB

8

VIIIB

9

VIIIB

10

IB

11

IIB

12

IIIA

13

IVA

14

VA

15

VIA

16

VIIA

17

2

1

H

2.20

3

VIIIA

18

He

4

5

6

7

8

9

10

Ne

17

Ar

35

Li

Be

B

C

N

O

F

0.98

1.57

2.04

2.55

3.04

3.44

3.98

0.93

1.31

1.61

1.90

2.19

2.58

3.16

Br

Kr

0.82

1.00

1.36

0.82

0.95

0.79

0.70

11

Na

19

K

37

Rb

55

Cs

87

Fr

12

13

Mg

20

Ca

Al

21

22

24

25

26

27

Cr

Mn

Fe

Co

1.54

1.63

1.66

1.55

1.83

1.22

1.33

1.60

2.16

2.10

0.89

1.10

1.30

1.50

1.70

0.90

1.10

58

59

60

Sr

56

Ba

88

Ra

6

7

39

Y

57

La

89

Ac

Ti

23

V

38

Sc

40

Zr

72

Hf

104

Rf

41

Nb

73

Ta

105

Db

42

Mo

74

W

106

Sg

28

29

30

31

Si

32

Ge

15

P

33

As

16

S

34

Se

Cl

Zn

1.88

1.91

1.90

1.65

1.81

2.01

2.18

2.55

2.96

3.00

2.20

2.28

2.20

1.93

1.69

1.78

1.96

2.05

2.10

2.66

2.60

1.90

2.20

2.20

2.28

2.54

2.00

1.62

2.33

2.02

2.00

2.20

2.20

61

62

63

64

65

66

67

68

69

70

71

Tc

75

Re

107

Bh

44

Ru

76

Os

108

Hs

45

Rh

77

Ir

109

Mt

46

Pd

78

Pt

110

Ds

47

Ag

79

Au

111

Rg

48

Cd

80

Hg

112

Cn

49

In

81

Tl

50

Sn

82

Pb

51

Sb

83

Bi

52

Te

84

Po

53

I

85

At

Pr

Nd

Pm

Sm

Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

1.12

1.13

1.14

1.13

1.17

1.20

1.20

1.10

1.22

1.23

1.24

1.25

1.10

1.27

1.30

1.50

1.38

1.36

1.28

1.13

1.28

1.30

1.30

1.30

1.30

1.30

1.30

1.30

Th

91

Pa

92

U

36

Cu

Ce

90

18

Ni

43

Ga

14

93

Np

94

Pu

95

Am

96

Cm

97

Bk

98

Cf

99

Es

100

Fm

101

Md

102

No

103

Lr

54

Xe

86

Rn

 ................
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