Periodic Table with Atomic Mass
The periodic table with atomic mass gives a comprehensive view of the various elements. Periodic table with atomic mass and number helps to understand the various properties, abbreviation and names of all the elements present in nature. The following article will help you learn more on the properties of periodic table.
The periodic table with atomic mass and number is one of the most important point of reference in the branch of chemistry. It is the Bible of chemistry without which, scientist and chemist will be lost. The chemical elements arranged in the periodic table help scientists, chemists, scholars, researchers and even students in understanding the various properties and characteristics of the elements in a glance. These elements are arranged in rows and columns, left to right and top to bottom. The elements are not placed haphazardly and follow a pattern, that is, in an increasing order of the atomic number.
Periodic Table with Atomic Mass and Atomic Number
There is a very long history of the periodic table. Dmitri Mendeleev, a Russian chemist is credited as the first person to invent the periodic table in 1869. There were many periodic tables introduced before Mendeleev's table, but he was the one who illustrated the recurring periodic trends in the element properties. Mendeleev found that 65 elements that were known in his time, could be arranged in a grid. He arranged the elements in his periodic table on the basis of the following points:
He arranged an element with a higher atomic weight element on its left.
Elements with similar properties were kept in the same column.
In the end, he got a periodic table with gaps and spaces, that meant there were further elements yet to be discovered. It was Mendeleev, who predicted elements not yet discovered like eka-silicon (as he found a gap between silicon and tin), today known as germanium, gallium today called aluminum and eka-boron, known as scandium. With his breakthrough, Mendeleev could not move further as the Rutherford-Bohr model of the atom was yet to be discovered.
After about 4 decades, Henry Moseley in 1913 showed the atomic number (charge) and not the atomic weight as proposed by Mendeleev as the fundamental chemical property of any element. With this knowledge, he was able to predict the presence of new elements. Thus, even today elements are arranged in the order of increasing atomic number (Z) left to right across the table. The vertical rows are known as groups and the horizontal rows as periods.
The alkali earth metals are found in group one and the group 2 contains alkaline earth metals. Both 1A and 2A contain the s-block elements. They contain the same number of outer electrons and thus show similar chemical properties. The groups in the following order 3B, 4B, 5B, 6B, 7B, 8B, 1B and 2B contain transition metals or the d-block elements. These transition elements have similar chemical properties like production of colored compounds, variable valency and often act as catalysts. The groups 3A, 4A, 5A, 6A and 7A consist of p-block elements. The 8A group contains noble gases. The inner transition element or f-block elements are placed under the transition elements in a separate table. These rare earth elements are divided into lanthanides (elements 58 - 71) and actinides (elements 90 - 103). They are found in very minute quantities naturally. The elements with atomic number higher than 92 are not found naturally and are produced artificially in nuclear reactors and particle accelerators.
You have read about the atomic mass and the atomic number of elements in this article. If you do not understand these terms, the following definitions will make it easier for you when reading the periodic table with atomic mass and atomic number.
Atomic Mass
The atomic mass is defined as the average mass of atoms of an element that is calculated with the help of relative abundance of isotopes of a naturally occurring element. For example the atomic mass of hydrogen is 1.0079 and carbon is 12.011.
Atomic Number
Atomic number is defined as the number of protons in an element. For example, the atomic number of hydrogen is one and carbon is 6 and oxygen is 8 atoms. The chemical behavior of the element is determined by the number of protons.
Atomic Symbol
The abbreviation or one/two letters that represent an element is called the atomic symbol. These are the truncated names or truncated Latin names of the element.
Periodic Table
s-block Transition Elements
d- block p-block Nobel
Element
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1
H
1.0079 2
He
4.0026
2 3
Li
6.941 4
Be
9.0122 5
B
10.811 6
C
12.011 7
N
14.007 8
O
15.999 9
F
18.998 10
Ne
20.180
3 11
Na
22.990 12
Mg
24.305 13
Al
26.982 14
Si
28.086 15
P
30.974 16
S
32.066 17
Cl
35.453 18
Ar
39.948
4 19
K
39.098 20
Ca
40.078 21
Sc
44.956 22
Ti
47.867 23
V
50.942 24
Cr
51.996 25
Mn
54.938 26
Fe
55.845 27
Co
58.933 28
Ni
58.693 29
Cu
63.546 30
Zn
65.409 31
Ga
69.723 32
Ge
72.64 33
As
74.922 34
Se
78.96 35
Br
79.904 36
Kr
83.798
5 37
Rb
85.468 38
Sr
87.62 39
Y
88.906 40
Zr
91.224 41
Nb
92.906 42
Mo
95.94 43
Tc
(98) 44
Ru
101.07 45
Rh
102.91 46
Pd
106.42 47
Ag
107.87 48
Cd
112.41 49
In
114.82 50
Sn
118.71 51
Sb
121.76 52
Te
127.60 53
I
126.90 54
Xe
131.29
6 55
Cs
132.91 56
Ba
137.33 57 - 71
La-Lu
72
Hf
178.49 73
Ta
180.95 74
W
183.84 75
Re
186.21 76
Os
190.23 77
Ir
192.22 78
Pt
195.08 79
Au
196.97 80
Hg
200.59 81
Tl
204.38 82
Pb
207.2 83
Bi
208.98 84
Po
(209) 85
At
(210) 86
Rn
(222)
7 87
Fr
(223) 88
Ra
(226) 89 -103
Ac-Lr
104
Rf
(261) 105
Db
(262) 106
Sg
(266) 107
Bh
(264) 108
Hs
(277) 109
Mt
(268) 110
Ds
(281) 111
Rg
(272) 112
Cn
(277)
Lanthanide 57
La
138.91 58
Ce
140.12 59
Pr
140.91 60
Nd
144.24 61
Pm
(145) 62
Sm
150.36 63
Eu
151.96 64
Gd
157.25 65
Tb
158.93 66
Dy
162.50 67
Ho
164.93 68
Er
167.26 69
Tm
168.93 70
Yb
173.04 71
Lu
174.97
Actinide 89
Ac
(227) 90
Th
232.04 91
Pa
231.04 92
U
238.03 93
Np
(237) 94
Pu
(244) 95
Am
(243) 96
Cm
(247) 97
Bk
(247) 98
Cf
(251) 99
Es
(252) 100
Fm
(257) 101
Md
(258) 102
No
(259) 103
Lr
(262)
Key for the Periodic Table
Alkali Metals
Alkaline Earth Metals
Lanthinides
Actinides
Transition Metals
Poor Metals
Other Metals
Nobel Gases
Metalloids
Unknown Chemical Properties
I hope this periodic table proves to be helpful to you. The periodic table is like the skeleton of chemistry that helps in revealing the mystery of the elements.
Read more at Buzzle: http://www.buzzle.com/articles/periodic-table-with-atomic-mass.html
The periodic table with atomic mass gives a comprehensive view of the various elements. Periodic table with atomic mass and number helps to understand the various properties, abbreviation and names of all the elements present in nature. The following article will help you learn more on the properties of periodic table.
The periodic table with atomic mass and number is one of the most important point of reference in the branch of chemistry. It is the Bible of chemistry without which, scientist and chemist will be lost. The chemical elements arranged in the periodic table help scientists, chemists, scholars, researchers and even students in understanding the various properties and characteristics of the elements in a glance. These elements are arranged in rows and columns, left to right and top to bottom. The elements are not placed haphazardly and follow a pattern, that is, in an increasing order of the atomic number.
Periodic Table with Atomic Mass and Atomic Number
There is a very long history of the periodic table. Dmitri Mendeleev, a Russian chemist is credited as the first person to invent the periodic table in 1869. There were many periodic tables introduced before Mendeleev's table, but he was the one who illustrated the recurring periodic trends in the element properties. Mendeleev found that 65 elements that were known in his time, could be arranged in a grid. He arranged the elements in his periodic table on the basis of the following points:
He arranged an element with a higher atomic weight element on its left.
Elements with similar properties were kept in the same column.
In the end, he got a periodic table with gaps and spaces, that meant there were further elements yet to be discovered. It was Mendeleev, who predicted elements not yet discovered like eka-silicon (as he found a gap between silicon and tin), today known as germanium, gallium today called aluminum and eka-boron, known as scandium. With his breakthrough, Mendeleev could not move further as the Rutherford-Bohr model of the atom was yet to be discovered.
After about 4 decades, Henry Moseley in 1913 showed the atomic number (charge) and not the atomic weight as proposed by Mendeleev as the fundamental chemical property of any element. With this knowledge, he was able to predict the presence of new elements. Thus, even today elements are arranged in the order of increasing atomic number (Z) left to right across the table. The vertical rows are known as groups and the horizontal rows as periods.
The alkali earth metals are found in group one and the group 2 contains alkaline earth metals. Both 1A and 2A contain the s-block elements. They contain the same number of outer electrons and thus show similar chemical properties. The groups in the following order 3B, 4B, 5B, 6B, 7B, 8B, 1B and 2B contain transition metals or the d-block elements. These transition elements have similar chemical properties like production of colored compounds, variable valency and often act as catalysts. The groups 3A, 4A, 5A, 6A and 7A consist of p-block elements. The 8A group contains noble gases. The inner transition element or f-block elements are placed under the transition elements in a separate table. These rare earth elements are divided into lanthanides (elements 58 - 71) and actinides (elements 90 - 103). They are found in very minute quantities naturally. The elements with atomic number higher than 92 are not found naturally and are produced artificially in nuclear reactors and particle accelerators.
You have read about the atomic mass and the atomic number of elements in this article. If you do not understand these terms, the following definitions will make it easier for you when reading the periodic table with atomic mass and atomic number.
Atomic Mass
The atomic mass is defined as the average mass of atoms of an element that is calculated with the help of relative abundance of isotopes of a naturally occurring element. For example the atomic mass of hydrogen is 1.0079 and carbon is 12.011.
Atomic Number
Atomic number is defined as the number of protons in an element. For example, the atomic number of hydrogen is one and carbon is 6 and oxygen is 8 atoms. The chemical behavior of the element is determined by the number of protons.
Atomic Symbol
The abbreviation or one/two letters that represent an element is called the atomic symbol. These are the truncated names or truncated Latin names of the element.
Periodic Table
s-block Transition Elements
d- block p-block Nobel
Element
Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1
H
1.0079 2
He
4.0026
2 3
Li
6.941 4
Be
9.0122 5
B
10.811 6
C
12.011 7
N
14.007 8
O
15.999 9
F
18.998 10
Ne
20.180
3 11
Na
22.990 12
Mg
24.305 13
Al
26.982 14
Si
28.086 15
P
30.974 16
S
32.066 17
Cl
35.453 18
Ar
39.948
4 19
K
39.098 20
Ca
40.078 21
Sc
44.956 22
Ti
47.867 23
V
50.942 24
Cr
51.996 25
Mn
54.938 26
Fe
55.845 27
Co
58.933 28
Ni
58.693 29
Cu
63.546 30
Zn
65.409 31
Ga
69.723 32
Ge
72.64 33
As
74.922 34
Se
78.96 35
Br
79.904 36
Kr
83.798
5 37
Rb
85.468 38
Sr
87.62 39
Y
88.906 40
Zr
91.224 41
Nb
92.906 42
Mo
95.94 43
Tc
(98) 44
Ru
101.07 45
Rh
102.91 46
Pd
106.42 47
Ag
107.87 48
Cd
112.41 49
In
114.82 50
Sn
118.71 51
Sb
121.76 52
Te
127.60 53
I
126.90 54
Xe
131.29
6 55
Cs
132.91 56
Ba
137.33 57 - 71
La-Lu
72
Hf
178.49 73
Ta
180.95 74
W
183.84 75
Re
186.21 76
Os
190.23 77
Ir
192.22 78
Pt
195.08 79
Au
196.97 80
Hg
200.59 81
Tl
204.38 82
Pb
207.2 83
Bi
208.98 84
Po
(209) 85
At
(210) 86
Rn
(222)
7 87
Fr
(223) 88
Ra
(226) 89 -103
Ac-Lr
104
Rf
(261) 105
Db
(262) 106
Sg
(266) 107
Bh
(264) 108
Hs
(277) 109
Mt
(268) 110
Ds
(281) 111
Rg
(272) 112
Cn
(277)
Lanthanide 57
La
138.91 58
Ce
140.12 59
Pr
140.91 60
Nd
144.24 61
Pm
(145) 62
Sm
150.36 63
Eu
151.96 64
Gd
157.25 65
Tb
158.93 66
Dy
162.50 67
Ho
164.93 68
Er
167.26 69
Tm
168.93 70
Yb
173.04 71
Lu
174.97
Actinide 89
Ac
(227) 90
Th
232.04 91
Pa
231.04 92
U
238.03 93
Np
(237) 94
Pu
(244) 95
Am
(243) 96
Cm
(247) 97
Bk
(247) 98
Cf
(251) 99
Es
(252) 100
Fm
(257) 101
Md
(258) 102
No
(259) 103
Lr
(262)
Key for the Periodic Table
Alkali Metals
Alkaline Earth Metals
Lanthinides
Actinides
Transition Metals
Poor Metals
Other Metals
Nobel Gases
Metalloids
Unknown Chemical Properties
I hope this periodic table proves to be helpful to you. The periodic table is like the skeleton of chemistry that helps in revealing the mystery of the elements.
Read more at Buzzle: http://www.buzzle.com/articles/periodic-table-with-atomic-mass.html
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