Name a Valid Chemical Element

Name any chemical element that belongs in each selected category.
Properties at standard conditions, unless otherwise mentioned
Standard conditions are 0°C and 1000 hPa
Quiz by eibi
Last updated: June 23, 2020
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First submittedJuly 16, 2019
Times taken1,709
Average score58.8%
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Name an element that ...
.. is a gas
Hydrogen, Helium, Oxygen, ... a liquid
Bromine, Mercury yellow
Sulphur, Gold, Fluorine, (Caesium, Chlorine)
..occurs naturally AND was discovered in the 20th century
Actinium, Lutetium, Rhenium, ... named after an object in the solar system
Helium, Cerium, Uranium, ... named after a country
Copper, Germanium, Nihonium, ... named after a city
Yttrium, Holmium, Berkelium, ... named after a woman (real or mythological)
Meitnerium, Curium; Vanadium, Selenium, Niobium
..does not end in "-ium", "-ine", "-en", or "-on"
Gold, Silver, Lead, Antimony ...
..contains the letter X
Oxygen, Xenon
..was named in the 21st century
Darmstadtium, Roentgenium, ...
..makes red fireworks
Lithium, Strontium
..was discovered during the Manhattan Project
Americium, Curium found in charcoal, diamonds, and lima beans
Carbon a "rare earth"
Cerium, Neodymium, Praseodymium, ...
..has an extra "i" in Britain, but not in the U.S.
..was once named Kurchatovium (Ku)
Level 65
Jul 16, 2019
Really cool concept :)
Level 88
Sep 7, 2019
Nice work! I had fun and learned some new facts about various elements, too.
Level 63
Feb 26, 2020
Named after a city: Moscovium
Level 64
Jun 22, 2020
Cesium/caesium is also yellow.
Level 80
Jun 23, 2020
Not if it is really pure! But it will work now.
Level 84
Aug 21, 2022
Never heard of Kurchatovium. My browser is underlining it and suggesting Khachaturian.
Level 44
Apr 26, 2023
Manganese doesn't work in the element ending question
Level 55
Nov 6, 2023
I saw on another quiz that technically speaking Mercury isn't named after the celestial body. It's named after the god independently from the planet, unlike Uranium, Neptunium, and Plutonium, etc.