| 20 answers for: Krypton and oxygen, e.g. |
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| RANK | ANSWER | CLUE |
| GASES | Krypton and oxygen, e.g. |
| TENTS | Pup and oxygen, e.g. |
| ELEMENTS | Hydrogen and oxygen, e.g. |
| RAMSAY | British chemist who discovered neon, argon, krypton and xenon, and won the 1904 Nobel Prize in Chemistry (last name only) |
| GAS | Oxygen, eg |
| RAREGASES | Krypton and xenon |
| INERT | Like krypton and some other gases |
| INERTGASES | Krypton and xenon, for two (5,5) |
| NEON | One of the elements co-discovered by Sir William Ramsay along with argon, helium, krypton and xenon |
| XENON | Meaning "strange(r)", an element other than argon, krypton and neon co-discovered by William Ramsay (5) |
| RARE | Which type of gases includes neon, krypton and xenon? (4) |
| ATOMS | Hydrogen, carbon, oxygen, e.g. |
| OCTET | The electrons of oxygen, e.g. |
| AEROBE | Bacterium requiring oxygen, e.g. |
| ELEMENT | Oxygen, e.g. |
| WATER | Substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. (5) |
| AERATE | Ants turn and ___ the soil, allowing water and oxygen to reach plant roots, thereby improving the quality of the soil |
| AIR | A mixture of mainly nitrogen and oxygen in which microlights and planes fly; a distinctive quality; a melodious song; or, a zephyr (3) |
| OPAL | Stone made of silicon and oxygen |
| NITRATE | Ion composed of Nitrogen and Oxygen |
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