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 Number | Element Name | Symbol | Atomic Mass | Valency |
|---|---|---|---|---|
| 1 | Hydrogen | H | 1.008 | 1 |
| 2 | Helium | He | 4.0026 | 0 |
| 3 | Lithium | Li | 6.94 | 1 |
| 4 | Beryllium | Be | 9.01 | 2 |
| 5 | Boron | B | 10.81 | 3 |
| 6 | Carbon | C | 12.01 | 4 |
| 7 | Nitrogen | N | 14.01 | 3 |
| 8 | Oxygen | O | 16.00 | 2 |
| 9 | Fluorine | F | 19.00 | 1 |
| 10 | Neon | Ne | 20.18 | 0 |
| 11 | Sodium | Na | 22.99 | 1 |
| 12 | Magnesium | Mg | 24.31 | 2 |
| 13 | Aluminium | Al | 26.98 | 3 |
| 14 | Silicon | Si | 28.09 | 4 |
| 15 | Phosphorus | P | 30.97 | 3,5 |
| 16 | Sulfur | S | 32.06 | 2,4,6 |
| 17 | Chlorine | Cl | 35.45 | 1,3,5,7 |
| 18 | Argon | Ar | 39.95 | 0 |
| 19 | Potassium | K | 39.10 | 1 |
| 20 | Calcium | Ca | 40.08 | 2 |
| 21 | Scandium | Sc | 44.96 | 3 |
| 22 | Titanium | Ti | 47.87 | 4 |
| 23 | Vanadium | V | 50.94 | 5 |
| 24 | Chromium | Cr | 52.00 | 2,3,6 |
| 25 | Manganese | Mn | 54.94 | 2,4,7 |
| 26 | Iron | Fe | 55.85 | 2,3 |
| 27 | Cobalt | Co | 58.93 | 2,3 |
| 28 | Nickel | Ni | 58.69 | 2 |
| 29 | Copper | Cu | 63.55 | 1,2 |
| 30 | Zinc | Zn | 65.38 | 2 |
| 31 | Gallium | Ga | 69.72 | 3 |
| 32 | Germanium | Ge | 72.63 | 4 |
| 33 | Arsenic | As | 74.92 | 3,5 |
| 34 | Selenium | Se | 78.97 | 2,4,6 |
| 35 | Bromine | Br | 79.90 | 1,3,5,7 |
| 36 | Krypton | Kr | 83.80 | 0 |
| 37 | Rubidium | Rb | 85.47 | 1 |
| 38 | Strontium | Sr | 87.62 | 2 |
| 39 | Yttrium | Y | 88.91 | 3 |
| 40 | Zirconium | Zr | 91.22 | 4 |
| 41 | Niobium | Nb | 92.91 | 5 |
| 42 | Molybdenum | Mo | 95.95 | 6 |
| 43 | Technetium | Tc | (98) | 7 |
| 44 | Ruthenium | Ru | 101.07 | 3,4 |
| 45 | Rhodium | Rh | 102.91 | 3 |
| 46 | Palladium | Pd | 106.42 | 2,4 |
| 47 | Silver | Ag | 107.87 | 1 |
| 48 | Cadmium | Cd | 112.41 | 2 |
| 49 | Indium | In | 114.82 | 3 |
| 50 | Tin | Sn | 118.71 | 2,4 |
| 51 | Antimony | Sb | 121.76 | 3,5 |
| 52 | Tellurium | Te | 127.60 | 2,4,6 |
| 53 | Iodine | I | 126.90 | 1,3,5,7 |
| 54 | Xenon | Xe | 131.29 | 0 |
| 55 | Cesium | Cs | 132.91 | 1 |
| 56 | Barium | Ba | 137.33 | 2 |
| 57 | Lanthanum | La | 138.91 | 3 |
| 58 | Cerium | Ce | 140.12 | 3,4 |
| 59 | Praseodymium | Pr | 140.91 | 3 |
| 60 | Neodymium | Nd | 144.24 | 3 |
| 61 | Promethium | Pm | (145) | 3 |
| 62 | Samarium | Sm | 150.36 | 2,3 |
| 63 | Europium | Eu | 151.96 | 2,3 |
| 64 | Gadolinium | Gd | 157.25 | 3 |
| 65 | Terbium | Tb | 158.93 | 3,4 |
| 66 | Dysprosium | Dy | 162.50 | 3 |
| 67 | Holmium | Ho | 164.93 | 3 |
| 68 | Erbium | Er | 167.26 | 3 |
| 69 | Thulium | Tm | 168.93 | 3 |
| 70 | Ytterbium | Yb | 173.05 | 2,3 |
| 71 | Lutetium | Lu | 174.97 | 3 |
| 72 | Hafnium | Hf | 178.49 | 4 |
| 73 | Tantalum | Ta | 180.95 | 5 |
| 74 | Tungsten | W | 183.84 | 6 |
| 75 | Rhenium | Re | 186.21 | 4,6,7 |
| 76 | Osmium | Os | 190.23 | 4,6,8 |
| 77 | Iridium | Ir | 192.22 | 3,4 |
| 78 | Platinum | Pt | 195.08 | 2,4 |
| 79 | Gold | Au | 196.97 | 1,3 |
| 80 | Mercury | Hg | 200.59 | 1,2 |
| 81 | Thallium | Tl | 204.38 | 1,3 |
| 82 | Lead | Pb | 207.2 | 2,4 |
| 83 | Bismuth | Bi | 208.98 | 3,5 |
| 84 | Polonium | Po | (209) | 2,4 |
| 85 | Astatine | At | (210) | 1,3,5,7 |
| 86 | Radon | Rn | (222) | 0 |
| 87 | Francium | Fr | (223) | 1 |
| 88 | Radium | Ra | (226) | 2 |
| 89 | Actinium | Ac | (227) | 3 |
| 90 | Thorium | Th | 232.04 | 4 |
| 91 | Protactinium | Pa | 231.04 | 5 |
| 92 | Uranium | U | 238.03 | 6 |
| 93 | Neptunium | Np | (237) | 5 |
| 94 | Plutonium | Pu | (244) | 3,4,6 |
| 95 | Americium | Am | (243) | 3 |
| 96 | Curium | Cm | (247) | 3 |
| 97 | Berkelium | Bk | (247) | 3,4 |
| 98 | Californium | Cf | (251) | 3 |
| 99 | Einsteinium | Es | (252) | 3 |
| 100 | Fermium | Fm | (257) | 3 |
| 101 | Mendelevium | Md | (258) | 3 |
| 102 | Nobelium | No | (259) | 2,3 |
| 103 | Lawrencium | Lr | (266) | 3 |
| 104 | Rutherfordium | Rf | (267) | 4 |
| 105 | Dubnium | Db | (268) | 5 |
| 106 | Seaborgium | Sg | (269) | 6 |
| 107 | Bohrium | Bh | (270) | 7 |
| 108 | Hassium | Hs | (269) | 8 |
| 109 | Meitnerium | Mt | (278) | Unknown |
| 110 | Darmstadtium | Ds | (281) | Unknown |
| 111 | Roentgenium | Rg | (282) | 1,3 |
| 112 | Copernicium | Cn | (285) | 2 |
| 113 | Nihonium | Nh | (286) | 1,3 |
| 114 | Flerovium | Fl | (289) | 2,4 |
| 115 | Moscovium | Mc | (290) | 1,3 |
| 116 | Livermorium | Lv | (293) | 2 |
| 117 | Tennessine | Ts | (294) | 1,3,5,7 |
| 118 | Oganesson | Og | (294) | 0 |
FAQs for List of Periodic Table Elements with Atomic Number
The atomic number of an element is the total number of protons present in the nucleus of an atom. Each element has a unique atomic number that helps identify it in the periodic table. For example, Hydrogen has atomic number 1, while Carbon has atomic number 6.
Valency is important because it helps in understanding how elements combine to form compounds. It tells the combining capacity of an atom. Students use valency while writing chemical formulas and balancing chemical equations.
Atomic number refers to the number of protons in an atom, while atomic mass represents the total mass of protons and neutrons present in the nucleus. Atomic number is always a whole number, but atomic mass can be a decimal value.
Students should learn the periodic table because it forms the foundation of chemistry. It helps in understanding chemical reactions, bonding, properties of elements, and compound formation. A good knowledge of the periodic table also improves exam performance in science subjects.