Science & tech
The “The chemical elements” quiz — Science & tech. It has 25 questions in five categories: Cosmic origins, Allotropes & phases, Names and places, Metals of technology, Poisons and remedies. Questions get harder as the points go up, from 100 to 500.
The 100- and 200-point questions are open here. The rest show only their first words, and there are no answers: all of that is in the game itself.
Which lightest element accounts for roughly 75% of the baryonic mass of the observable universe?
Which element is produced in red giant stars by the triple-alpha process fusing three alpha particles?
Exothermic stellar fusion in…
In the gameWhich lightest alkali metal…
In the gameThe 1952 detection of…
In the gameWhich halogen is the only nonmetallic chemical element that is liquid at standard room temperature and pressure?
White, red, and black are allotropes of which element, named from the Greek for “light-bearer”?
Solder failure that leaked…
In the gameWhich noble gas becomes…
In the gameWith a density of…
In the game
Which radioactive element, isolated in 1898 by Marie and Pierre Curie, was named after Marie's native homeland?
In 1789, Martin Heinrich Klaproth named which heavy element after a planet discovered eight years earlier?
Predicted by Mendeleev as…
In the gameWhich lanthanide with atomic…
In the gameDiscovered in 1923 at…
In the game
Prized in aerospace for its strength-to-weight ratio, which transition metal formed most of the SR-71 Blackbird airframe?
Which lanthanide with atomic number 60 is used to manufacture the world's strongest permanent magnets?
Which malleable group 13…
In the gameNamed after a daughter…
In the gameThe 2010 Nobel Prize…
In the gameNicknamed the “King of Poisons” and “inheritance powder”, which metalloid was historically detected by the Marsh test?
The acetate of which toxic heavy metal has a sweet taste and was used by ancient Romans to sweeten sour wine?
Discovered accidentally by Barnett…
In the gameCausing rapid hair loss…
In the gameOnce thought the heaviest…
In the gameAll 25 questions and the answers are in the game. Invite your class or friends with a link — guests need no account.