Includes interactive visualizations, properties, orbitals, isotopes, and compound mixing.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1 H Hydrogen 1.0081


C Solid
Hg Liquid
H Gas
Rf Unknown
Metals Nonmetals
Alkali metals Alkaline earth metals Lanthanoids Transition metals Post-transition metals Metalloids Other nonmetals Halogens Noble gases
Actinoids
7s
6s
5s
4s
3s
2s
1s
7p
6p
5p
4p
3p
2p
6d
5d
4d
3d
=
m=
n=
5f
4f
s
p
d
f
α Alpha decay β− Beta decay
p Proton emission β+ Positron emission
n Neutron emission K+ Electron capture
SF Spontaneous fission   Stable
2 He Helium 4.0026022 K
2 3 Li Lithium 6.942
1
4 Be Beryllium 9.01218312
2
5 B Boron 10.812
3
6 C Carbon 12.0112
4
7 N Nitrogen 14.0072
5
8 O Oxygen 15.9992
6
9 F Fluorine 18.9984031632
7
10 Ne Neon 20.17972
8
K
L
3 11 Na Sodium 22.989769282
8
1
12 Mg Magnesium 24.3052
8
2
13 Al Aluminium 26.98153852
8
3
14 Si Silicon 28.0852
8
4
15 P Phosphorus 30.9737619982
8
5
16 S Sulfur 32.062
8
6
17 Cl Chlorine 35.452
8
7
18 Ar Argon 39.9482
8
8
K
L
M
4 19 K Potassium 39.09832
8
8
1
20 Ca Calcium 40.0782
8
8
2
21 Sc Scandium 44.9559082
8
9
2
22 Ti Titanium 47.8672
8
10
2
23 V Vanadium 50.94152
8
11
2
24 Cr Chromium 51.99612
8
13
1
25 Mn Manganese 54.9380442
8
13
2
26 Fe Iron 55.8452
8
14
2
27 Co Cobalt 58.9331942
8
15
2
28 Ni Nickel 58.69342
8
16
2
29 Cu Copper 63.5462
8
18
1
30 Zn Zinc 65.382
8
18
2
31 Ga Gallium 69.7232
8
18
3
32 Ge Germanium 72.632
8
18
4
33 As Arsenic 74.9215952
8
18
5
34 Se Selenium 78.9712
8
18
6
35 Br Bromine 79.9042
8
18
7
36 Kr Krypton 83.7982
8
18
8
K
L
M
N
5 37 Rb Rubidium 85.46782
8
18
8
1
38 Sr Strontium 87.622
8
18
8
2
39 Y Yttrium 88.905842
8
18
9
2
40 Zr Zirconium 91.2242
8
18
10
2
41 Nb Niobium 92.906372
8
18
12
1
42 Mo Molybdenum 95.952
8
18
13
1
43 Tc Technetium (98)2
8
18
13
2
44 Ru Ruthenium 101.072
8
18
15
1
45 Rh Rhodium 102.905502
8
18
16
1
46 Pd Palladium 106.422
8
18
18
47 Ag Silver 107.86822
8
18
18
1
48 Cd Cadmium 112.4142
8
18
18
2
49 In Indium 114.8182
8
18
18
3
50 Sn Tin 118.7102
8
18
18
4
51 Sb Antimony 121.7602
8
18
18
5
52 Te Tellurium 127.602
8
18
18
6
53 I Iodine 126.904472
8
18
18
7
54 Xe Xenon 131.2932
8
18
18
8
K
L
M
N
O
6 55 Cs Caesium 132.905451962
8
18
18
8
1
56 Ba Barium 137.3272
8
18
18
8
2
57 to 71 72 Hf Hafnium 178.492
8
18
32
10
2
73 Ta Tantalum 180.947882
8
18
32
11
2
74 W Tungsten 183.842
8
18
32
12
2
75 Re Rhenium 186.2072
8
18
32
13
2
76 Os Osmium 190.232
8
18
32
14
2
77 Ir Iridium 192.2172
8
18
32
15
2
78 Pt Platinum 195.0842
8
18
32
17
1
79 Au Gold 196.9665692
8
18
32
18
1
80 Hg Mercury 200.592
8
18
32
18
2
81 Tl Thallium 204.382
8
18
32
18
3
82 Pb Lead 207.22
8
18
32
18
4
83 Bi Bismuth 208.980402
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
K
L
M
N
O
P
7 87 Fr Francium (223)2
8
18
32
18
8
1
88 Ra Radium (226)2
8
18
32
18
8
2
89 to 103 104 Rf Rutherfordium (267)2
8
18
32
32
10
2
105 Db Dubnium (268)2
8
18
32
32
11
2
106 Sg Seaborgium (271)2
8
18
32
32
12
2
107 Bh Bohrium (272)2
8
18
32
32
13
2
108 Hs Hassium (270)2
8
18
32
32
14
2
109 Mt Meitnerium (276)2
8
18
32
32
15
2
110 Ds Darmstadtium (281)2
8
18
32
32
17
1
111 Rg Roentgenium (280)2
8
18
32
32
18
1
112 Cn Copernicium (285)2
8
18
32
32
18
2
113 Nh Nihonium (284)2
8
18
32
32
18
3
114 Fl Flerovium (289)2
8
18
32
32
18
4
115 Mc Moscovium (288)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
K
L
M
N
O
P
Q
57 La Lanthanum 138.905472
8
18
18
9
2
58 Ce Cerium 140.1162
8
18
19
9
2
59 Pr Praseodymium 140.907662
8
18
21
8
2
60 Nd Neodymium 144.2422
8
18
22
8
2
61 Pm Promethium (145)2
8
18
23
8
2
62 Sm Samarium 150.362
8
18
24
8
2
63 Eu Europium 151.9642
8
18
25
8
2
64 Gd Gadolinium 157.252
8
18
25
9
2
65 Tb Terbium 158.925352
8
18
27
8
2
66 Dy Dysprosium 162.5002
8
18
28
8
2
67 Ho Holmium 164.930332
8
18
29
8
2
68 Er Erbium 167.2592
8
18
30
8
2
69 Tm Thulium 168.934222
8
18
31
8
2
70 Yb Ytterbium 173.0542
8
18
32
8
2
71 Lu Lutetium 174.96682
8
18
32
9
2
89 Ac (227)2
8
18
32
18
9
2
90 Th Thorium 232.03772
8
18
32
18
10
2
91 Pa Protactinium 231.035882
8
18
32
20
9
2
92 U Uranium 238.028912
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 (262)2
8
18
32
32
8
3

Wikipedia - - Periodic Table

Periodic Table Chemical Element Loading…

Periodic Table

Importance of Periodic table


The Periodic Table is said to be as one of the necessary and useful tools of chemistry and also the other sciences. There has been an infinite number of changes in the modern periodic table since the origin of Mendeleev's table, yet both these tables are known to be of great importance for the same reasons. The table organizes the elements as accordingly with the properties, such that the characteristics of an element can be explained by just looking at its position on the periodic table.

A periodic table is defined as “the systematic arrangement of all the chemical elements in different orders of their atomic numbers, the Electron configuration, and also their chemical properties.”

Before the discovery of naturally occurring elements, the periodic table was used in predicting the physical and chemical properties of elements. At present, this modern periodic table is used in predicting the elements that are said to be discovered in the future. The new elements formed are said to be very radioactive.

The periodic table is of more use to the students and scientists as it helps them in knowing what kind of chemical reactions occurs in nature, how the elements have formed, the constitution of elements, the atomic weight of elements, their atomic mass, and also the charge. A glance at the periodic table tells about its characteristics and features of all the elements such as its reactivity, its hardness or softness, etc.

Properties of Periodic Table

The properties of periodic table are as listed below-


The periodic table is the arrangement of elements by its periodic properties, which are known to be as recurring trends in the chemical and physical characteristics. These form of patterns can also be predicted just by examining the periodic table. It can also be understood and explained by analyzing electron configurations of the elements.

Periodic Table Arrangement

The periodic table has a total of 118 elements. These elements are not created or discovered as according to the order of their atomic numbers. Scientists are said to be working hard on creating as well as verifying the element number 120, that is known to change the appearance of the table. The periodic table consists of groups, periods, transition elements, etc.


Groups are nothing but the columns of the periodic table. The atoms of various elements within the group are said to have similar kind of valence electrons and also share similar properties. They tend to act in the same way as in the chemical reactions. The periodic table has four blocks naming s block, p block, d block and f block elements.


The rows within the periodic table are called to be as periods. The atoms of elements share the same kind of highest energy level of the electron. They also possess the same sort of outer electron arrangement.

Apart from this, the other group of elements of the periodic table mostly forms the metals. The alkaline earth, alkali metals, elemental earth metals, the transition metals, actinides and lanthanides all are said to be the groups of metals.

As we move from left to right in the periodic table,


As you move from the top to the bottom of the periodic table,


The elements of periodic table are known to be the essential tools of chemistry. To get more out of the table, it also helps in identifying the parts of elements and also how to make use of the chart to predict the elemental properties.

Join Byju’s Chemistry Apps Learning Program

-->