Education

Periodic Table of Elements

An interactive periodic table of all 118 chemical elements. Click any element to see its name, uses and electron diagram, or try the element symbol quiz in the next tab.

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Swipe sideways to see the whole table. Tap any element to see its details.

What Is the Periodic Table?

The periodic table is how chemists organize every chemical element known to humans, ordered by atomic number, which is the number of protons in the nucleus. The layout is not random: elements with similar chemical properties are deliberately placed in the same column, so the table also works as a map for guessing how an element will behave when it meets other elements.

The interactive periodic table on this page includes all 118 elements, with their English names, everyday uses, and a simple diagram showing how their electrons are arranged. Click any element to start exploring.

How to Read the Periodic Table

Period
Horizontal rows 1-7
Shows the number of electron shells. The further down you go, the more shells there are.
Group
Vertical columns 1-18
Shows the number of electrons in the outer shell. Elements in the same group tend to behave alike.
Lanthanides & Actinides
The two rows below
Elements 57-71 and 89-103, moved down so the table does not get too wide.
Cell color
Element category
Each color stands for one category, such as alkali metals or noble gases. See the list below.

Element Categories

Every element belongs to one of the categories below, marked with a different color in the table above.

Nonmetal
Usually brittle, dull, and poor conductors of electricity. Examples: carbon, oxygen.
Noble gas
Group 18 elements that are very stable and rarely react with other elements. Examples: helium, neon.
Alkali metal
Group 1 metals that are very reactive, soft, and react easily with water. Examples: sodium, potassium.
Alkaline earth metal
Group 2 metals that are fairly reactive and common in the Earth's crust. Examples: calcium, magnesium.
Metalloid
Properties fall between metals and nonmetals, often used as semiconductors. Example: silicon.
Halogen
Group 17 elements that are very reactive and often used as disinfectants. Examples: chlorine, iodine.
Post-transition metal
Soft metals found after the transition metals. Examples: aluminium, tin.
Transition metal
The largest group of metals on the periodic table, usually hard and good conductors of electricity. Examples: iron, copper.
Lanthanide
A series of 15 rare earth metals, important for magnets and electronic screens.
Actinide
A series of 15 radioactive elements, mostly man-made, including uranium.
Unknown
Superheavy elements made in laboratories whose chemical properties are not yet fully known.

List of All 118 Elements

Tap any element to read its full page: name, uses, and electron diagram.

H Hydrogen He Helium Li Lithium Be Beryllium B Boron C Carbon N Nitrogen O Oxygen F Fluorine Ne Neon Na Sodium Mg Magnesium Al Aluminium Si Silicon P Phosphorus S Sulfur Cl Chlorine Ar Argon K Potassium Ca Calcium Sc Scandium Ti Titanium V Vanadium Cr Chromium Mn Manganese Fe Iron Co Cobalt Ni Nickel Cu Copper Zn Zinc Ga Gallium Ge Germanium As Arsenic Se Selenium Br Bromine Kr Krypton Rb Rubidium Sr Strontium Y Yttrium Zr Zirconium Nb Niobium Mo Molybdenum Tc Technetium Ru Ruthenium Rh Rhodium Pd Palladium Ag Silver Cd Cadmium In Indium Sn Tin Sb Antimony Te Tellurium I Iodine Xe Xenon Cs Caesium Ba Barium La Lanthanum Ce Cerium Pr Praseodymium Nd Neodymium Pm Promethium Sm Samarium Eu Europium Gd Gadolinium Tb Terbium Dy Dysprosium Ho Holmium Er Erbium Tm Thulium Yb Ytterbium Lu Lutetium Hf Hafnium Ta Tantalum W Tungsten Re Rhenium Os Osmium Ir Iridium Pt Platinum Au Gold Hg Mercury Tl Thallium Pb Lead Bi Bismuth Po Polonium At Astatine Rn Radon Fr Francium Ra Radium Ac Actinium Th Thorium Pa Protactinium U Uranium Np Neptunium Pu Plutonium Am Americium Cm Curium Bk Berkelium Cf Californium Es Einsteinium Fm Fermium Md Mendelevium No Nobelium Lr Lawrencium Rf Rutherfordium Db Dubnium Sg Seaborgium Bh Bohrium Hs Hassium Mt Meitnerium Ds Darmstadtium Rg Roentgenium Cn Copernicium Nh Nihonium Fl Flerovium Mc Moscovium Lv Livermorium Ts Tennessine Og Oganesson

Frequently Asked Questions

The periodic table is an arrangement of all known chemical elements, ordered by atomic number (the number of protons) from left to right, with elements that behave similarly lined up in columns from top to bottom. It helps you predict how an element will react just from its position.
There are 118 elements, from Hydrogen (atomic number 1) to Oganesson (atomic number 118). Elements 1 to about 94 occur naturally on Earth, while the rest are synthetic elements made in laboratories that last only a fraction of a second.
A period is a horizontal row (1 to 7) and shows how many electron shells an element has. A group is a vertical column (1 to 18) and shows how many electrons sit in the outer shell. Elements in the same group usually have similar chemical properties, for example group 1 is made of reactive metals.
Those two rows are the lanthanide series (elements 57-71) and the actinide series (elements 89-103). They actually belong in periods 6 and 7, but they are moved down so the main table does not get too wide. The dashed cells labeled "57-71" and "89-103" in the main table show where they really fit.
The concentric-ring diagram shows electron shells using a simplified Bohr model: the nucleus sits in the middle and each shell is a ring of electrons. The first shell holds up to 2 electrons, the second up to 8, the third up to 18, and so on. The number on each ring is its electron count, and the proton and neutron counts of the nucleus are listed below the diagram. This is an approximation for learning, not the full electron configuration, which is more complex because of the s, p, d and f subshells.
For long-known elements, the state at room temperature matches common chemistry facts, for example oxygen and nitrogen are gases, while mercury and bromine are liquids. For synthetic superheavy elements (atomic number 104 and up), the state is only an estimate because these elements decay within milliseconds and have never been measured directly in bulk.
Open the Symbol Quiz tab, press start, then answer 10 multiple-choice questions that show an element symbol (for example "Fe") and you guess its English name (Iron). The questions and answer choices are shuffled every time, so your results can differ each time you play.
Yes, as a quick reference and an interactive study tool, but for assignments that need highly precise data (like boiling points or ionization energies), still check your chemistry textbook or an official academic source. This page is meant to help you get familiar with the layout of the periodic table and what each element is used for, in an easy-to-follow way.
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