Gases at room temperature
Type a name, a symbol, an atomic number — or something vague like radioactive, liquid or d-block.
11 elements match
H
Hydrogen
The simplest atom there is — one proton, one electron — and about 90% of every atom in the universe.
He
Helium
Inert, weightless and permanently escaping: helium is the only element that will not freeze at ordinary pressure, no matter how cold you make it.
N
Nitrogen
78% of the air you are breathing right now, held together by one of the strongest bonds in chemistry.
O
Oxygen
The element that rusts iron, burns fuel and keeps you alive — and the most abundant element in the Earth's crust.
F
Fluorine
The most electronegative element known: fluorine takes electrons from almost anything, including glass and water.
Ne
Neon
Chemically inert, optically unforgettable: neon is the orange-red glow that defined the twentieth-century city at night.
Cl
Chlorine
A pale green gas that kills bacteria, bleaches fabric — and, bound to sodium, sits on your dinner table.
Ar
Argon
The third most common gas in the air, and completely uninterested in reacting with any of it.
Kr
Krypton
Named "hidden", used to define the metre, and briefly the fictional weakness of a superhero.
Xe
Xenon
A noble gas heavy enough to be an anaesthetic, and bright enough to flash a camera.
Rn
Radon
A radioactive noble gas that seeps out of granite and is the second leading cause of lung cancer.
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What this understands
Identity
Names, symbols and atomic numbers, in any case. au, Gold and 79 all land on the same page.
Families & blocks
noble gas, halogen, lanthanide, d-block, period 4, group 17.
Properties
radioactive, synthetic, liquid, gas, precious — and any text from an electron configuration.