Science quiz
Click the elements that are gases
Eleven elements are gases at room temperature. They are all on this board, among 31 that are not. Click the gases and nothing else.
- Format
- Click the grid
- Items
- 11 to click
- Limit
- 1:00
- Level
- Medium
- Checked
- 2026.10.03
- To find
- 11
- Time limit
- 1:00
- Minefield
- One wrong click ends it
- Click every valid item, in any order.
- Decoys look plausible. Read carefully.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Click every element that is a gas at room temperature. The grid appears when you start.
About this quiz
The gases are hydrogen, nitrogen, oxygen, fluorine, chlorine and the six noble gases. Everything else on the board is a solid, apart from bromine and mercury, the two liquids.
- Bromine is the trap: it sits between two gases in the table's last columns but is a liquid.
- Iodine is a solid, though it turns to a violet vapour when warmed.
- The buttons are in A to Z order.
Sources
- [1]PubChem, National Institutes of Health. Periodic Table of Elements.
Last checked October 3, 2026
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