Interactive Periodic Table
Periodic Table with Element Details, Atomic Numbers and Electron Configurations
The Ferrum Periodic Table is an interactive chemistry tool for exploring all 118 elements by symbol, atomic number, category and core element properties. Each element cell shows the atomic number, symbol and category at a glance; English detail pages now cover all 118 elements from Hydrogen to Oganesson, including atomic mass, electron configuration, melting and boiling points, uses, isotopes, compounds, history and study notes. This page is designed for quick chemistry reference, periodic table practice and global searches for topics such as atomic number, electron configuration and periodic table with element details.
Ordered by Atomic Number
The modern periodic table arranges elements by increasing atomic number. Atomic number is the number of protons in the nucleus and defines the identity of each element, starting with Hydrogen (1), Helium (2) and Lithium (3).
Groups, Periods and Electron Configuration
Rows are periods and columns are groups. Electron configuration helps explain shells, valence electrons and s, p, d and f blocks, making it easier to understand metals, nonmetals, halogens and noble gases.
A Fast Chemistry Reference
Use the table as a chemistry reference for atomic radius, ionization energy, electronegativity, metallic character, valence electrons, group numbers and period numbers.
How to Read the Periodic Table
A useful periodic table should do more than display a chart. It should connect atomic number, group, period, electron configuration and periodic trends in one place. Ferrum combines those ideas with an interactive table: search by element name, symbol or atomic number, compare element categories by color, use temperature mode to see solid, liquid and gas behavior, and open element detail pages when an English guide is available. Across a period from left to right, atomic radius generally decreases while ionization energy and electronegativity tend to increase. Down a group, added electron shells make atoms larger and related chemical properties repeat.
A Short History of the Periodic Table
The periodic table is based on the repeating patterns of element properties. In 1869, Dmitri Mendeleev arranged elements by atomic mass and similar chemical behavior, even predicting properties of elements that had not yet been discovered. Later, Henry Moseley showed that the correct order depends on atomic number, the number of protons in the nucleus. The modern periodic table follows this atomic number order, which is why it is useful not only for memorizing symbols but also for predicting chemical behavior.
First 80 Elements in the Periodic Table
All 118 elements are the foundation for learning element symbols, atomic numbers, electron configurations and simple periodic trends. Hydrogen through Neodymium cover the early s-, p-, d- and lanthanide start story, Promethium through Lutetium add rare earth technology, Hafnium through Thorium introduce dense transition-metal, heavy p-block and early actinide context, and Protactinium through Oganesson focus on uranium fuel, radioisotopes, neutron sources, atom-by-atom synthesis, superheavy element chemistry and period 7 completion.
Important Element Groups
- Group 1 alkali metals: lithium, sodium and potassium commonly form +1 ions and react readily.
- Group 2 alkaline earth metals: magnesium and calcium commonly form +2 ions.
- Period 4 transition metals: scandium through zinc introduce d-block electron configurations, variable oxidation states and important alloys.
- Period 4 p-block and period 5 start: gallium through krypton finish period 4, while rubidium through zirconium introduce the next s- and d-block rows.
- Period 5 transition and post-transition metals: niobium through tin include superconductors, catalysts, precious metals, toxic heavy metals and display materials.
- Period 5 p-block and lanthanide start: antimony through xenon finish period 5, while cesium through neodymium introduce alkali, alkaline earth and rare earth chemistry.
- Lanthanide technology block: promethium through lutetium cover radioisotopes, high-temperature magnets, phosphors, MRI contrast, fiber amplifiers, medical lasers, optical atomic clocks and PET imaging.
- Period 6 transition metals: hafnium through mercury include high-k dielectrics, tantalum capacitors, tungsten carbide, rhenium superalloys, platinum catalysts, gold electronics and mercury toxicity.
- Period 6 p-block and early actinides: thallium through thorium cover heavy-metal toxicity, radiogenic isotope dating, radon risk, targeted alpha therapy and thorium fuel-cycle research.
- Late actinides and superheavy elements: protactinium through oganesson cover uranium fuel, plutonium RTGs, californium neutron sources, atom-by-atom synthesis, 7p-block chemistry, the island of stability and period 7 completion.
- Group 17 halogens: fluorine, chlorine, bromine and iodine are reactive nonmetals with strong electron-gaining tendencies.
- Group 18 noble gases: helium, neon and argon have stable electron arrangements and very low reactivity.
First 80 Elements Table
This table of all 118 elements compares atomic number, symbol, group, period and electron configuration in one place. It is useful for quick review, classroom reference and learning how elements fit into the periodic table, including the first full d-block sequence from Scandium to Zinc, period 5 elements from Rubidium to Xenon, lanthanides from Lanthanum to Lutetium, period 6 transition metals through Mercury, actinides through Lawrencium and superheavy elements through Oganesson.
| Atomic No. | Symbol | Element | Group | Period | Electron Configuration |
|---|---|---|---|---|---|
| 1 | H | Hydrogen | Group 1 (Nonmetal) | Period 1 | 1s¹ |
| 2 | He | Helium | Group 18 (Noble Gas) | Period 1 | 1s² |
| 3 | Li | Lithium | Group 1 (Alkali Metal) | Period 2 | [He] 2s¹ |
| 4 | Be | Beryllium | Group 2 (Alkaline Earth Metal) | Period 2 | [He] 2s² |
| 5 | B | Boron | Group 13 (Metalloid) | Period 2 | [He] 2s² 2p¹ |
| 6 | C | Carbon | Group 14 (Nonmetal) | Period 2 | [He] 2s² 2p² |
| 7 | N | Nitrogen | Group 15 (Nonmetal) | Period 2 | [He] 2s² 2p³ |
| 8 | O | Oxygen | Group 16 (Nonmetal) | Period 2 | [He] 2s² 2p⁴ |
| 9 | F | Fluorine | Group 17 (Halogen) | Period 2 | [He] 2s² 2p⁵ |
| 10 | Ne | Neon | Group 18 (Noble Gas) | Period 2 | [He] 2s² 2p⁶ |
| 11 | Na | Sodium | Group 1 (Alkali Metal) | Period 3 | [Ne] 3s¹ |
| 12 | Mg | Magnesium | Group 2 (Alkaline Earth Metal) | Period 3 | [Ne] 3s² |
| 13 | Al | Aluminum | Group 13 (Post-Transition Metal) | Period 3 | [Ne] 3s² 3p¹ |
| 14 | Si | Silicon | Group 14 (Metalloid) | Period 3 | [Ne] 3s² 3p² |
| 15 | P | Phosphorus | Group 15 (Nonmetal) | Period 3 | [Ne] 3s² 3p³ |
| 16 | S | Sulfur | Group 16 (Nonmetal) | Period 3 | [Ne] 3s² 3p⁴ |
| 17 | Cl | Chlorine | Group 17 (Halogen) | Period 3 | [Ne] 3s² 3p⁵ |
| 18 | Ar | Argon | Group 18 (Noble Gas) | Period 3 | [Ne] 3s² 3p⁶ |
| 19 | K | Potassium | Group 1 (Alkali Metal) | Period 4 | [Ar] 4s¹ |
| 20 | Ca | Calcium | Group 2 (Alkaline Earth Metal) | Period 4 | [Ar] 4s² |
| 21 | Sc | Scandium | Group 3 (Transition Metal) | Period 4 | [Ar] 3d¹ 4s² |
| 22 | Ti | Titanium | Group 4 (Transition Metal) | Period 4 | [Ar] 3d² 4s² |
| 23 | V | Vanadium | Group 5 (Transition Metal) | Period 4 | [Ar] 3d³ 4s² |
| 24 | Cr | Chromium | Group 6 (Transition Metal) | Period 4 | [Ar] 3d⁵ 4s¹ |
| 25 | Mn | Manganese | Group 7 (Transition Metal) | Period 4 | [Ar] 3d⁵ 4s² |
| 26 | Fe | Iron | Group 8 (Transition Metal) | Period 4 | [Ar] 3d⁶ 4s² |
| 27 | Co | Cobalt | Group 9 (Transition Metal) | Period 4 | [Ar] 3d⁷ 4s² |
| 28 | Ni | Nickel | Group 10 (Transition Metal) | Period 4 | [Ar] 3d⁸ 4s² |
| 29 | Cu | Copper | Group 11 (Transition Metal) | Period 4 | [Ar] 3d¹⁰ 4s¹ |
| 30 | Zn | Zinc | Group 12 (Transition Metal) | Period 4 | [Ar] 3d¹⁰ 4s² |
| 31 | Ga | Gallium | Group 13 (Post-Transition Metal) | Period 4 | [Ar] 3d¹⁰ 4s² 4p¹ |
| 32 | Ge | Germanium | Group 14 (Metalloid) | Period 4 | [Ar] 3d¹⁰ 4s² 4p² |
| 33 | As | Arsenic | Group 15 (Metalloid) | Period 4 | [Ar] 3d¹⁰ 4s² 4p³ |
| 34 | Se | Selenium | Group 16 (Nonmetal) | Period 4 | [Ar] 3d¹⁰ 4s² 4p⁴ |
| 35 | Br | Bromine | Group 17 (Halogen) | Period 4 | [Ar] 3d¹⁰ 4s² 4p⁵ |
| 36 | Kr | Krypton | Group 18 (Noble Gas) | Period 4 | [Ar] 3d¹⁰ 4s² 4p⁶ |
| 37 | Rb | Rubidium | Group 1 (Alkali Metal) | Period 5 | [Kr] 5s¹ |
| 38 | Sr | Strontium | Group 2 (Alkaline Earth Metal) | Period 5 | [Kr] 5s² |
| 39 | Y | Yttrium | Group 3 (Transition Metal) | Period 5 | [Kr] 4d¹ 5s² |
| 40 | Zr | Zirconium | Group 4 (Transition Metal) | Period 5 | [Kr] 4d² 5s² |
| 41 | Nb | Niobium | Group 5 (Transition Metal) | Period 5 | [Kr] 4d⁴ 5s¹ |
| 42 | Mo | Molybdenum | Group 6 (Transition Metal) | Period 5 | [Kr] 4d⁵ 5s¹ |
| 43 | Tc | Technetium | Group 7 (Transition Metal) | Period 5 | [Kr] 4d⁵ 5s² |
| 44 | Ru | Ruthenium | Group 8 (Transition Metal) | Period 5 | [Kr] 4d⁷ 5s¹ |
| 45 | Rh | Rhodium | Group 9 (Transition Metal) | Period 5 | [Kr] 4d⁸ 5s¹ |
| 46 | Pd | Palladium | Group 10 (Transition Metal) | Period 5 | [Kr] 4d¹⁰ |
| 47 | Ag | Silver | Group 11 (Transition Metal) | Period 5 | [Kr] 4d¹⁰ 5s¹ |
| 48 | Cd | Cadmium | Group 12 (Transition Metal) | Period 5 | [Kr] 4d¹⁰ 5s² |
| 49 | In | Indium | Group 13 (Post-Transition Metal) | Period 5 | [Kr] 4d¹⁰ 5s² 5p¹ |
| 50 | Sn | Tin | Group 14 (Post-Transition Metal) | Period 5 | [Kr] 4d¹⁰ 5s² 5p² |
| 51 | Sb | Antimony | Group 15 (Metalloid) | Period 5 | [Kr] 4d¹⁰ 5s² 5p³ |
| 52 | Te | Tellurium | Group 16 (Metalloid) | Period 5 | [Kr] 4d¹⁰ 5s² 5p⁴ |
| 53 | I | Iodine | Group 17 (Halogen) | Period 5 | [Kr] 4d¹⁰ 5s² 5p⁵ |
| 54 | Xe | Xenon | Group 18 (Noble Gas) | Period 5 | [Kr] 4d¹⁰ 5s² 5p⁶ |
| 55 | Cs | Cesium | Group 1 (Alkali Metal) | Period 6 | [Xe] 6s¹ |
| 56 | Ba | Barium | Group 2 (Alkaline Earth Metal) | Period 6 | [Xe] 6s² |
| 57 | La | Lanthanum | Lanthanide (Lanthanide) | Period 6 | [Xe] 5d¹ 6s² |
| 58 | Ce | Cerium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹ 5d¹ 6s² |
| 59 | Pr | Praseodymium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f³ 6s² |
| 60 | Nd | Neodymium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁴ 6s² |
| 61 | Pm | Promethium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁵ 6s² |
| 62 | Sm | Samarium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁶ 6s² |
| 63 | Eu | Europium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁷ 6s² |
| 64 | Gd | Gadolinium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁷ 5d¹ 6s² |
| 65 | Tb | Terbium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f⁹ 6s² |
| 66 | Dy | Dysprosium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹⁰ 6s² |
| 67 | Ho | Holmium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹¹ 6s² |
| 68 | Er | Erbium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹² 6s² |
| 69 | Tm | Thulium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹³ 6s² |
| 70 | Yb | Ytterbium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹⁴ 6s² |
| 71 | Lu | Lutetium | Lanthanide (Lanthanide) | Period 6 | [Xe] 4f¹⁴ 5d¹ 6s² |
| 72 | Hf | Hafnium | Group 4 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d² 6s² |
| 73 | Ta | Tantalum | Group 5 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d³ 6s² |
| 74 | W | Tungsten | Group 6 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d⁴ 6s² |
| 75 | Re | Rhenium | Group 7 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d⁵ 6s² |
| 76 | Os | Osmium | Group 8 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d⁶ 6s² |
| 77 | Ir | Iridium | Group 9 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d⁷ 6s² |
| 78 | Pt | Platinum | Group 10 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d⁹ 6s¹ |
| 79 | Au | Gold | Group 11 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s¹ |
| 80 | Hg | Mercury | Group 12 (Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² |
| 81 | Tl | Thallium | Group 13 (Post-Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹ |
| 82 | Pb | Lead | Group 14 (Post-Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p² |
| 83 | Bi | Bismuth | Group 15 (Post-Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³ |
| 84 | Po | Polonium | Group 16 (Post-Transition Metal) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴ |
| 85 | At | Astatine | Group 17 (Halogen) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵ |
| 86 | Rn | Radon | Group 18 (Noble Gas) | Period 6 | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ |
| 87 | Fr | Francium | Group 1 (Alkali Metal) | Period 7 | [Rn] 7s¹ |
| 88 | Ra | Radium | Group 2 (Alkaline Earth Metal) | Period 7 | [Rn] 7s² |
| 89 | Ac | Actinium | Actinide (Actinide) | Period 7 | [Rn] 6d¹ 7s² |
| 90 | Th | Thorium | Actinide (Actinide) | Period 7 | [Rn] 6d² 7s² |
| 91 | Pa | Protactinium | Actinide (Actinide) | Period 7 | [Rn] 5f² 6d¹ 7s² |
| 92 | U | Uranium | Actinide (Actinide) | Period 7 | [Rn] 5f³ 6d¹ 7s² |
| 93 | Np | Neptunium | Actinide (Actinide) | Period 7 | [Rn] 5f⁴ 6d¹ 7s² |
| 94 | Pu | Plutonium | Actinide (Actinide) | Period 7 | [Rn] 5f⁶ 7s² |
| 95 | Am | Americium | Actinide (Actinide) | Period 7 | [Rn] 5f⁷ 7s² |
| 96 | Cm | Curium | Actinide (Actinide) | Period 7 | [Rn] 5f⁷ 6d¹ 7s² |
| 97 | Bk | Berkelium | Actinide (Actinide) | Period 7 | [Rn] 5f⁹ 7s² |
| 98 | Cf | Californium | Actinide (Actinide) | Period 7 | [Rn] 5f¹⁰ 7s² |
| 99 | Es | Einsteinium | Actinide (Actinide) | Period 7 | [Rn] 5f¹¹ 7s² |
| 100 | Fm | Fermium | Actinide (Actinide) | Period 7 | [Rn] 5f¹² 7s² |
| 101 | Md | Mendelevium | Actinide (Actinide) | Period 7 | [Rn] 5f¹³ 7s² |
| 102 | No | Nobelium | Actinide (Actinide) | Period 7 | [Rn] 5f¹⁴ 7s² |
| 103 | Lr | Lawrencium | Actinide (Actinide) | Period 7 | [Rn] 5f¹⁴ 7s² 7p¹ |
| 104 | Rf | Rutherfordium | Group 4 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d² 7s² |
| 105 | Db | Dubnium | Group 5 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d³ 7s² |
| 106 | Sg | Seaborgium | Group 6 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d⁴ 7s² |
| 107 | Bh | Bohrium | Group 7 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d⁵ 7s² |
| 108 | Hs | Hassium | Group 8 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d⁶ 7s² |
| 109 | Mt | Meitnerium | Group 9 (Unknown) | Period 7 | [Rn] 5f¹⁴ 6d⁷ 7s² |
| 110 | Ds | Darmstadtium | Group 10 (Unknown) | Period 7 | [Rn] 5f¹⁴ 6d⁹ 7s¹ |
| 111 | Rg | Roentgenium | Group 11 (Unknown) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s¹ |
| 112 | Cn | Copernicium | Group 12 (Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² |
| 113 | Nh | Nihonium | Group 13 (Post-Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ |
| 114 | Fl | Flerovium | Group 14 (Post-Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² |
| 115 | Mc | Moscovium | Group 15 (Post-Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³ |
| 116 | Lv | Livermorium | Group 16 (Post-Transition Metal) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴ |
| 117 | Ts | Tennessine | Group 17 (Halogen) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵ |
| 118 | Og | Oganesson | Group 18 (Noble Gas) | Period 7 | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ |
Periodic Trends
Atomic Radius
Atomic radius generally decreases from left to right across a period and increases down a group as additional electron shells are added.
Ionization Energy
Ionization energy is the energy required to remove an electron. It generally increases across a period and decreases down a group.
Electronegativity
Electronegativity measures how strongly an atom attracts bonding electrons. Fluorine is the most electronegative element.
Periodic Table FAQ
What is the periodic table?
The periodic table is an organized chart of chemical elements ordered by atomic number and arranged so that elements with similar properties appear in related groups and periods.
What information does this periodic table show?
It shows atomic number, symbol, element name, atomic mass, group, period, category, electron configuration, state and key physical properties for each element.
How are elements arranged in the periodic table?
Elements are arranged by increasing atomic number. Rows are periods, columns are groups, and repeating chemical properties create the periodic trends.