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Showing posts with label Chemical News & Interesting. Show all posts
Showing posts with label Chemical News & Interesting. Show all posts

Periodic Table with Bond Dissociation Enthalpies

Periodic Table with Bond Dissociation Enthalpies

Periodic Table with Bond Dissociation Enthalpies EH(A-A)

 

Bond dissociation enthalpies (energies) for bonds A-A at 298 K and 1 atm pressure are given in Table 1. Average values of bond dissociation enthalpies of the A-B bond in a series of different compounds are given in the post "Bond Dissociation Enthalpies"

 

Table 1: Bond Dissociation Enthalpies EH (A-A) (kJ/mol) at 298 K and 1 atm
1 2 3 4 5 6 7 8 9 10 11 12

H

436

 

                   

Li

102.8

Be

9.46

     

 

 

     

 

 

Na

72.6

Mg

 

                   

K

54.8

Ca

 

Sc

 

Ti

 

V

 

Cr

 

Mn

 

Fe

 

Co

 

Ni

 

Cu

 

Zn

 

Rb

51.0

Sr

 

Y

 

Zr

 

Nb

 

Mo

 

Tc

 

Ru

 

Rh

 

Pd

 

Ag

 

Cd

 

Cs

44.8

Ba

 

La

 

Hf

 

Ta

 

W

 

Re

 

Os

 

Ir

 

Pt

 

Au

 

Hg

 

Fr

 

Ra

 

Ac

 

Th

 

Pa

 

U

 

Np

 

         

 

Table 1 (continued...)
13 14 15 16 17

B

295

C

178

N

945

O

498

F

158

Al

167

Si

317

P

485

S

429

Cl

243

Ga

116

Ge

280

As

383

Se

308

Br

193

In

106

Sn

192

Sb

289

Te

225

I

151

Tl

˜63

Pb

61

Bi

194

Po

 

At

110

 



References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

bond enthalpies, bond dissociation enthalpies, table with bond dissociation enthalpies,


Atomic Radius Periodic Table of the Elements

Atomic Radius Periodic Table of the Elements

Periodic Table with Atomic Radius

 

Atom size values cannot be specified exactly. These values can be obtained by measuring the distances between atoms in chemical compounds. Measurements of this type have led to the values of atomic radii for the elements shown below.

 

Table 1: Periodic Table with Atomic Radii (Å) of the elements
1 2 3 4 5 6 7 8 9 10 11 12

H

0.37

 

                   

Li

1.52

Be

1.13

     

 

 

     

 

 

Na

1.86

Mg

1.60

                   

K

2.27

Ca

1.97

Sc

1.61

Ti

1.45

V

1.31

Cr

1.25

Mn

1.37

Fe

1.24

Co

1.25

Ni

1.25

Cu

1.28

Zn

1.34

Rb

2.47

Sr

2.15

Y

1.78

Zr

1.59

Nb

1.43

Mo

1.36

Tc

1.35

Ru

1.32

Rh

1.34

Pd

1.38

Ag

1.44

Cd

1.49

Cs

2.65

Ba

2.17

La

1.72

Hf

1.56

Ta

1.43

W

1.37

Re

1.34

Os

1.34

Ir

1.36

Pt

1.37

Au

1.44

Hg

1.50

Fr

~2.7

Ra

2.23

Ac

1.88

Th

1.80

Pa

1.61

U

1.38

Np

1.30

         

 

Table 1 (continued...)
13 14 15 16 17

B

0.88

C

0.77

N

0.70

O

0.66

F

0.64

Al

1.43

Si

1.17

P

1.10

S

1.04

Cl

0.99

Ga

1.22

Ge

1.22

As

1.21

Se

1.17

Br

1.14

In

1.63

Sn

1.40

Sb

1.41

Te

1.43

I

1.33

Tl

1.70

Pb

1.75

Bi

1.55

Po

1.67

At

1.40

 



References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

atomic radius, periodic table with atomic radius,


Ionic Radius Periodic Table of the Elements

Ionic Radius Periodic Table of the Elements

Periodic Table with Ionic Radius

 

Ion size plays an important role in determining the structure and stability of ionic solids, the properties of ions in aqueous solution, and the biological effects of ions. As with atoms, it is impossible to define precisely the sizes of ions. Ionic radii are determined from the measured distances between ion centers in ionic compounds. A table of ionic radii is given below.

 

Table 1: Periodic Table with Ionic Radii (Å) of the elements
1 2 3 4 5 6 7

H

1.46

 

         

Li

0.68

Be

0.31

     

 

 

Na

0.98

Mg

0.66

         

K

1.33

Ca

0.99

Sc

0.81

Ti

0.68

 

 

 

 

V

0.59 (+5)

0.63 (+4)

0.74 (+3)

0.88 (+2)

 

 

Cr

0.63 (+3)

0.89 (+2)

Mn

0.80 (+2)

Rb

1.48

Sr

1.13

Y

0.93

Zr

0.80

 

Nb

0.69 (+5)

0.74 (+4)

 

Mo

0.62 (+6)

0.70 (+4)

Tc

 

Cs

1.67

Ba

1.35

La

0.85 (+3)

Hf

0.78

Ta

0.68 (+5)

 

W

0.62 (+6)

0.70 (+4)

 

Re

0.56 (+7)

0.27 (+4)

Fr

˜1.8

Ra

1.43

Ac

 

Th

 

Pa

 

U

 

Np

 

 

Table 1 (continued...)
  8 9 10 11 12
 

 

Fe

0.60 (+3)

0.72 (+2)

 

Co

0.63 (+3)

0.72 (+2)

Ni

0.69 (+2)

 

Cu

0.72 (+2)

0.96 (+1)

Zn

0.74 (+2)

 

Ru

0.68 (+3)

Rh

0.68 (+3)

 

Pd

0.65 (+4)

0.80 (+2)

 

Ag

0.89 (+2)

1.26 (+1)

 

Cd

0.97 (+2)

1.14 (+1)

 

 

Os

0.69 (+6)

0.88 (+4)

Ir

0.68 (+4)

 

Pt

0.65 (+4)

0.80 (+2)

 

Au

0.85 (+2)

1.37 (+1)

 

Hg

1.10 (+2)

1.27 (+1)

 

Table 1 (continued...)
13 14 15 16 17 17

B

0.23 (+3)

 

C

0.15 (+4)

2.60 (-4)

N

1.71 (-3)

O

1.40 (-2)

F

1.33

He

 

Al

0.51 (+3)

 

Si

0.42 (+4)

2.71 (-4)

 

P

0.44 (+3)

2.12(-3)

 

S

0.29 (+6)

1.84 (-2)

Cl

1.81

Ne

 

Ga

0.62 (+3)

 

Ge

0.53 (+4)

0.73 (+2)

 

 

As

0.46 (+5)

0.58 (+3)

2.22 (-3)

 

Se

0.42 (+6)

1.98 (-2)

Br

1.96

Ar

 

In

0.81 (+3)

 

Sn

0.71(+4)

0.93 (+2)

 

 

Sb

0.62 (+5)

0.76 (+3)

2.45 (-3)

 

Te

0.56 (+6)

2.21 (-2)

I

2.20

Kr

 

Tl

0.95 (+3)

 

Pb

0.84 (+4)

1.20 (+2)

Bi

0.96 (+3)

Po

0.67 (+6)

At

˜2.27

Xe

 

 



References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

ionic radius, , ionic size, ionic radius table,


Ionization Energy Periodic Table of the Elements

Ionization Energies Periodic Table of the Elements

Periodic Table with Ionization Energies

 

The ionization energy of an atom or ion is the minimum energy required to remove an electron from the ground state of the isolated gaseous atom or ion. The first ionization energy, I1, is the energy needed to remove the first electron from a neutral atom.

M (g) —› M+ (g) + e-

It is related to the atom's electronegativity and electron affinity. Tables of electronegativities and electron affinities were given in the posts entitled "Electronegativities Periodic Table of the Elements" and "Electron Affinities Periodic Table of the Elements". A table of first ionization energies of the elements is given below.

 

Table 1: Periodic Table with Ionization Energies (kJ/mol) of gaseous atoms of the elements
1 2 3 4 5 6 7 8 9 10 11 12

H

1312.00

 

                   

Li

520.2

Be

899.4

     

 

 

     

 

 

Na

495.8

Mg

737.7

                   

K

418.8

Ca

589.8

Sc

631

Ti

658

V

650

Cr

652.8

Mn

717.4

Fe

759.3

Co

758

Ni

736.7

Cu

745.4

Zn

906.4

Rb

403.0

Sr

549.5

Y

616

Zr

660

Nb

664

Mo

684.9

Tc

702

Ru

711

Rh

720

Pd

805

Ag

731.0

Cd

867.7

Cs

375.7

Ba

502.9

La

523.5

Hf

654

Ta

761

W

770

Re

760

Os

840

Ir

880

Pt

868

Au

890.1

Hg

1007.0

Fr

˜400

Ra

 

Ac

 

Th

 

Pa

 

U

 

Np

 

         

 

Table 1 (continued...)
13 14 15 16 17 17

B

800.6

C

1086.4

N

1402.3

O

140.98

F

1681.0

He

2372.3

Al

577.6

Si

786.4

P

1011.7

S

200.41

Cl

1251.1

Ne

2080.6

Ga

578.8

Ge

762.2

As

947

Se

194.97

Br

1139.9

Ar

1520.5

In

558.3

Sn

708.6

Sb

833.7

Te

190.15

I

1008.4

Kr

1350.7

Tl

589.3

Pb

715.5

Bi

703.3

Po

˜180

At

˜930

Xe

1170.4

 



References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

electron affinities, electronegativity difference, electron affinity, ionization energy,


Electron Affinities Periodic Table of the Elements

Electron affinities Periodic Table of the Elements

Periodic Table with Electron Affinities

 

The electron affinity of an atom is the energy released when an electron is added to it. It is related to the atom's ionization energy and electronegativity. The basic difference between ionization energy and electron affinity is that ionization energy measures the ease with which an atom loses an electron, while electron affinity measures the ease with which an atom gains an electron.

 

Table 1: Periodic Table with Electron Affinities (kJ/mol) of gaseous atoms of the elements
1 2 3 4 5 6 7 8 9 10 11 12

H

72.77

 

                   

Li

59.63

Be

< 0

     

 

 

     

 

 

Na

52.87

Mg

< 0

                   

K

48.38

Ca

2.0

Sc

18.1

Ti

7.6

V

50.7

Cr

64.3

Mn

< 0

Fe

15.7

Co

63.8

Ni

111.5

Cu

118.5

Zn

< 0

Rb

46.88

Sr

4.6

Y

29.6

Zr

41.1

Nb

86.2

Mo

72.0

Tc

˜53

Ru

˜100

Rh

110

Pd

51.8

Ag

125.6

Cd

< 0

Cs

45.50

Ba

13.95

La

˜50

Hf

˜0

Ta

31.1

W

78.6

Re

˜14

Os

˜106

Ir

151

Pt

205.1

Au

222.7

Hg

< 0

Fr

44.00

Ra

> 0

Ac

1.1

Th

1.3

Pa

 

U

 

Np

 

         

 

Table 1 (continued...)
13 14 15 16 17

B

26.7

C

121.85

N

-7

O

140.98

F

328.0

Al

42.6

Si

133.6

P

72.03

S

200.41

Cl

349.0

Ga

29

Ge

˜120

As

˜80

Se

194.97

Br

324.7

In

29

Sn

˜120

Sb

103

Te

190.15

I

295.2

Tl

˜20

Pb

35.1

Bi

91.3

Po

˜180

At

˜270

         

 



References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

electron affinities, electronegativity difference, electron affinity, ionization energy,