Complete Clue List
Across
1. Souvenir item (1-5)
4. Descriptive of water that's somewhat salty (8)
9. Corrosion resistance means process equipment like ____ (not the war weapons) are made from 1D (5)
10. Secure from lepidoptera (9)
11. Common sense, or so say we in France (4)
12. Without; 1D is quite ductile (wire forming), especially in an oxygen-____ environment (4)
13. Mourner in the Biblical Book of Ruth (Ruth 1:2-5 [NIV]) (5)
15. Of little value, like 5D because of its short half-life (13 hours) and radioactive nature (7)
16. Grand achievement, like an historic chemist identifying an unknown Group 4 element (4)
17. Zr and Hf: ____ elements among the most difficult to separate due to chemical similarity (3)
20. Eins, zwei, ____ (4)
21. Type in again, as a password (2-5)
24. Charged forms of metals, at greatest risk for toxicity, such as Hf compounds (5)
25. Surrounded by (4)
26. In 1808, chemist Sir Humphry ____ attempted to isolate 28A by electrolysis and named the element (4)
28. A lustrous, strong metallic element resembling 1D; atomic number 40 (9)
29. Alloys of 1D are strong and lightweight; uses include jet engines and ____craft (5)
30. Type of writer, maybe even a scientist discussing discoveries (8)
31. Oxidation numbers, also known as oxidation ____; with Group 4 these are mainly +4 and also +3 (6)
Down
1. Group 4 element named after a group in Greek myth (8)
2. One recognised for outstanding contributions: see 5D (UK spelling, 8)
3. Corrosion resistance of 1D means it's used instead of iron which tends to ____ (4)
5. Synthetic, radioactive Group 4 element, named after 1908 Nobel Chemistry Laureate (13)
6. Danish physicist Niels Bohr was born here in 1885 (10)
7. Attachable patch or transfer for (1A)s (4-2)
8. Latin name for 6D, after which element #72 is named (6)
10. SADISTIC CRY I'M making about saturated fats from nutmeg (anag., 8,5)
14. FRY REACTOR? Not with these stable Group 4 metals, very resistant to heat and wear (adj., anag., 10)
18. "I've got proof!" Like 1D's melting point being 1,668 °C/3,034 °F (2'1,1,4)
19. Dreary colour of 28A (UK spelling, 8)
22. Fail miserably (6)
23. Prelims (abbr., 6)
27. Ain't right? (contraction, 3'1)