About Chemistry Quiz #838
Chemistry Quiz #838 was the quiz for Sunday, October 18, 2026: 10 questions: 3 easy, 4 medium and 3 hard. Everyone who played Chemistry Quiz that day got the same quiz, and it stays here to play for 60 days.
The questions of Chemistry Quiz #838
- What is the hardest natural substance?
- What is it called when a gas turns into a liquid?
- Which light metal are pop cans usually made from?
- What is the liquid metal used in old thermometers?
- What is the "lead" in a pencil actually made of?
- Steel is mostly iron mixed with a small amount of what?
- What is the chemical formula for ozone?
- What kind of material, like most plastics, is made of long chains of repeating molecules?
- Which element gives fireworks a bright red colour?
- Which carbon isotope is used to date old bones and wood?
The answer options and the answers appear only when you play the quiz, one question at a time.
New to Chemistry Quiz? The rules, tips and common questions are on the Chemistry Quiz page, and Periodic Table Memory Tips for the Quiz goes into strategy.
Other days of Chemistry Quiz
- Chemistry Quiz #841, Oct 21
- Chemistry Quiz #840, Oct 20
- Chemistry Quiz #839, Oct 19
- Chemistry Quiz #837, Oct 17
- Chemistry Quiz #836, Oct 16
- Chemistry Quiz #835, Oct 15
- Today’s quiz, #851
Every day of the last 60 is in the puzzle archive.