Random Element Generator

Pick a random chemical element from the periodic table, filtered by group, period or state, or switch to a random planet, dwarf planet or moon.

Pick from

Element group

Period (row)

State at room temperature

Atomic number

Type of body

Show

How many

No repeats

What you can do here

Random element from all 118 elements with symbol, atomic number, atomic mass, group, period, category and state

Filters: element group (alkali metals to noble gases), period 1 to 7, solid, liquid or gas, first 20 or first 54, natural or synthetic

Random planet generator: 8 planets, 5 dwarf planets and 15 major moons with distance, diameter, moons and a key fact

Up to 118 results with no repeats, for assigning a different element to every student

Name, name and symbol or full-detail output; click-to-copy cards, .txt and .csv download; ?mode=planet and other deep links

How to use the random element generator

Leave Pick from on chemical elements and press Generate for a random element from all 118 in the periodic table. Each card shows the symbol, atomic number, name, atomic mass, group, period, element category and whether it is a solid, liquid or gas at room temperature. Narrow the draw with the group, period, state and atomic-number filters, raise How many for a list, and keep No repeats ticked to draw without replacement, like pulling cards from a deck.

Filter by element group and period

Group	Count	Examples
Alkali metals	6	Lithium, Sodium, Potassium
Alkaline earth metals	6	Magnesium, Calcium, Barium
Transition metals	34	Iron, Copper, Gold
Post-transition metals	8	Aluminium, Tin, Lead
Metalloids	6	Boron, Silicon, Arsenic
Reactive nonmetals and halogens	12	Carbon, Oxygen, Chlorine
Noble gases	6	Helium, Neon, Argon
Lanthanides and actinides	30	Neodymium, Uranium, Plutonium
Unknown properties (superheavy)	10	Meitnerium to Oganesson

Periods are the rows of the table (1 to 7). The First 20 elements preset matches what many school courses ask students to learn by heart, from hydrogen to calcium. Synthetic elements (technetium, promethium and americium onwards) can be excluded or picked on their own.

Random planet generator

Switch Pick from to Planets, dwarf planets & moons to draw from the eight planets, five recognised dwarf planets (Ceres, Pluto, Eris, Haumea and Makemake) and fifteen notable moons. Each result gives its distance from the Sun or the planet it orbits, its diameter, how many moons it has and a fact worth remembering, such as Venus being the hottest planet or Ganymede being bigger than Mercury. Moon counts for the giant planets keep rising as astronomers find small moons, so they are shown as minimums.

Ideas for a random element or planet

Chemistry revision: generate an element, cover the card and say its symbol, group and state.

Element project: assign each student a different element with No repeats ticked.

Quiz nights: full-details output makes instant question cards.

Space lessons and worldbuilding: a random planet or moon as a research topic or story setting.

Frequently asked questions

How many elements can the generator pick from?

All 118 elements of the periodic table, from hydrogen (1) to oganesson (118), with symbol, atomic number, atomic mass, group, period, category and state.

Can I get a random element from the first 20?

Yes. Use the First 20 elements preset or set Atomic number to 1 to 20. Other presets pick transition metals, noble gases, halogens or lanthanides.

Can I assign a different element to every student?

Yes. Set How many to the class size and keep No repeats ticked. Each element appears once, and you can download the list as a CSV.

Which elements are liquid at room temperature?

Only bromine and mercury in this table. Eleven are gases, and the superheavy elements from fermium (100) onwards are marked unknown because only a few atoms have ever been made.

Does it include a random planet generator?

Yes. Switch Pick from to Planets, dwarf planets and moons, or open ?mode=planet, to draw one of the eight planets, a dwarf planet or a major moon with key facts.