Complete Clue List
Across
1. Material produced by or used in a reaction involving changes in atoms or molecules (8)
5. Medicinal plant, used for treating bruises (6)
10. Likely legal precedents OR a set of "knowns" in a laboratory procedure (4,5)
11. Feed livestock for a fee OR one who disparages seniors (5)
12. Possesses (4)
13. Plant, with seeds in a closed ovary (10)
15. Made of stone (6)
16. Photography pioneer George ____ (Kodak) used processes that relied on chemistry (7)
19. Treated badly (3-4)
21. Suckling site (6)
23. Estimate, ballpark figure (5,5)
25. Hardly hard, like the texture of 14D (4)
27. Prefix meaning "stomach" (var., 5-)
28. RUE TEDIUM, finding that this stable hydrogen isotope has a mass number of two (anag., 9)
29. Most recent; like 17D in the Group 15 elements, first synthesised in 2003 (6)
30. CLAIM HAT needed about two egg-shaped masses at the base of the brain (anag., 8)
Down
1. A positively charged ion, eg Bi3+ (6)
2. Required; 18D and 14D are ____ elements for all forms of life (9)
3. Allergic reaction in need of a scratch (4)
4. Group 15 toxic metalloid (#33), three allotropes, used in herbicides and insecticides (7)
6. Examined again (10)
7. From DIME I found organic ammonia derivative (anag., 5)
8. Group 15 metalloid (#51) with 4 allotropes, found in stibnite, used in a range of alloys (8)
9. Have lofty goals (6)
14. Group 15 solid, highly reactive non-metal (#15) with two common allotropes (white and red) (10)
17. Synthetic Group 15 element (#115), extremely radioactive, named after a Russian Oblast (9)
18. Gaseous Group 15 non-metal (#7), makes up much of Earth's atmosphere, occurs in proteins (8)
20. Ancient Celtic priests, medical professionals in their day (6)
21. Metallic Group 15 element (#83), brittle with low thermal and electrical conductivities (7)
22. Kind of number or weight in chemistry (6)
24. Remove stitches from (5)
26. Basic unit of living organisms, multiplies by dividing (4)