Find the answers to this quick chemistry crossword featuring physicists, fevers, flame tests and more.

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Squares filled: 0/166
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Across
1Hearable (7)
5Relating to the conjunction of celestial bodies (7)
9Fat cell (9)
10More recent (5)
11Bird studiers (14)
13Birthplace of Enrico Fermi (4)
14Enzyme (10)
17Plumbago (6, 4)
18Fever (4)
20English cosmologist, theoretical physicist and author of A Brief History of Time (7, 7)
23Flame test colour of thallium (which was how it was discovered in 1861 and contributed to its name) (5)
24Increasing rate of a chemical reaction by a substance that is not consumed in the reaction (9)
25Scorned (7)
26Precursors of foetuses (7)

Down
1Jelly-like substance obtained from red algae and often found in Petri dishes (4)
2Russian chemist who formulated The Periodic Law (6, 9)
3Vitamin B7 (6)
4Having redness of the skin (9)
5Orbit of an electron around a nucleus (5)
610^-12 kg (8)
7US radiochemist and co-discoverer of five superheavy elements (4, 11)
8Named in a religious ceremony (10)
12Glucose (5, 5)
15Pledge (9)
16The B in the organochlorine PCB (8)
19First American space station (6)
21Type of rechargeable battery, named after the two key chemical elements in it (5)
22Snakes (4)