MyClass24 logo
myclass24
YOUR CLASS. YOUR PACE.

List of Periodic Table Elements with Atomic Number

About the Periodic Table Elements

The above table provides important information about the elements of the periodic table, including their atomic number, atomic mass, symbol, and valence. These details are very useful for students studying chemistry in school and preparing for competitive exams. The periodic table is one of the most important concepts in science because it helps us understand the properties and behaviour of elements.

Atomic number represents the number of protons present in the nucleus of an atom. Every element has a unique atomic number. For example, Hydrogen has atomic number 1, while Oxygen has atomic number 8. Atomic mass shows the average mass of an element’s atoms. It is useful in chemical calculations and balancing equations. Valency is another important property shown in the table. It tells us how many electrons an atom can gain, lose, or share during a chemical reaction. For instance, Sodium has valency 1, Magnesium has valency 2, and Carbon has valency 4. Knowing valency helps students write chemical formulas correctly and understand compound formation.

The periodic table is widely used in chemistry chapters related to chemical reactions, compounds, acids, bases, metals, non-metals, and bonding. Learning the periodic table improves problem-solving skills in chemistry and builds a strong foundation for higher studies. Students should regularly revise the symbols, atomic numbers, and valencies of common elements for better understanding and quick recall during exams.

List of Periodic Table Elements with Atomic Number, Atomic Mass and Valency

Atomic NumberElement NameSymbolAtomic MassValency
1HydrogenH1.0081
2HeliumHe4.00260
3LithiumLi6.941
4BerylliumBe9.012
5BoronB10.813
6CarbonC12.014
7NitrogenN14.013
8OxygenO16.002
9FluorineF19.001
10NeonNe20.180
11SodiumNa22.991
12MagnesiumMg24.312
13AluminiumAl26.983
14SiliconSi28.094
15PhosphorusP30.973,5
16SulfurS32.062,4,6
17ChlorineCl35.451,3,5,7
18ArgonAr39.950
19PotassiumK39.101
20CalciumCa40.082
21ScandiumSc44.963
22TitaniumTi47.874
23VanadiumV50.945
24ChromiumCr52.002,3,6
25ManganeseMn54.942,4,7
26IronFe55.852,3
27CobaltCo58.932,3
28NickelNi58.692
29CopperCu63.551,2
30ZincZn65.382
31GalliumGa69.723
32GermaniumGe72.634
33ArsenicAs74.923,5
34SeleniumSe78.972,4,6
35BromineBr79.901,3,5,7
36KryptonKr83.800
37RubidiumRb85.471
38StrontiumSr87.622
39YttriumY88.913
40ZirconiumZr91.224
41NiobiumNb92.915
42MolybdenumMo95.956
43TechnetiumTc(98)7
44RutheniumRu101.073,4
45RhodiumRh102.913
46PalladiumPd106.422,4
47SilverAg107.871
48CadmiumCd112.412
49IndiumIn114.823
50TinSn118.712,4
51AntimonySb121.763,5
52TelluriumTe127.602,4,6
53IodineI126.901,3,5,7
54XenonXe131.290
55CesiumCs132.911
56BariumBa137.332
57LanthanumLa138.913
58CeriumCe140.123,4
59PraseodymiumPr140.913
60NeodymiumNd144.243
61PromethiumPm(145)3
62SamariumSm150.362,3
63EuropiumEu151.962,3
64GadoliniumGd157.253
65TerbiumTb158.933,4
66DysprosiumDy162.503
67HolmiumHo164.933
68ErbiumEr167.263
69ThuliumTm168.933
70YtterbiumYb173.052,3
71LutetiumLu174.973
72HafniumHf178.494
73TantalumTa180.955
74TungstenW183.846
75RheniumRe186.214,6,7
76OsmiumOs190.234,6,8
77IridiumIr192.223,4
78PlatinumPt195.082,4
79GoldAu196.971,3
80MercuryHg200.591,2
81ThalliumTl204.381,3
82LeadPb207.22,4
83BismuthBi208.983,5
84PoloniumPo(209)2,4
85AstatineAt(210)1,3,5,7
86RadonRn(222)0
87FranciumFr(223)1
88RadiumRa(226)2
89ActiniumAc(227)3
90ThoriumTh232.044
91ProtactiniumPa231.045
92UraniumU238.036
93NeptuniumNp(237)5
94PlutoniumPu(244)3,4,6
95AmericiumAm(243)3
96CuriumCm(247)3
97BerkeliumBk(247)3,4
98CaliforniumCf(251)3
99EinsteiniumEs(252)3
100FermiumFm(257)3
101MendeleviumMd(258)3
102NobeliumNo(259)2,3
103LawrenciumLr(266)3
104RutherfordiumRf(267)4
105DubniumDb(268)5
106SeaborgiumSg(269)6
107BohriumBh(270)7
108HassiumHs(269)8
109MeitneriumMt(278)Unknown
110DarmstadtiumDs(281)Unknown
111RoentgeniumRg(282)1,3
112CoperniciumCn(285)2
113NihoniumNh(286)1,3
114FleroviumFl(289)2,4
115MoscoviumMc(290)1,3
116LivermoriumLv(293)2
117TennessineTs(294)1,3,5,7
118OganessonOg(294)0

FAQs for List of Periodic Table Elements with Atomic Number