IB Chemistry Holiday Crossword (and solution)
Thursday 12 December 2024
.jpg)
IB Chemistry Holiday Crossword 2024
When you are relaxing and have got some time to spare over the holiday period you might like to try to solve this crossword which I've made up. You can download a pdf of the grid and the clues either for your own use or to give to your students. You can view the solution and notes on a few of the answers in the hidden box at the foot of the page. I hope you enjoy it. Geoff
Across
1. Order of reaction of bromoethane with hydroxide ions (6)
4. Optical reader does this for Paper 1 (Section A) (6)
8. Sounds as if his parents didn't think this theoretical chemist was so hot (7)
9. Reject then add oxygen gas below before subtracting one above to give this ion (7)
11. Cial and ore scrambled for a reaction initiator (3,7)
12. Ten superscript twelve (4)
13. Review the money spent equipping your school laboratory (5)
14. Implant chemistry into students (although if you put energy in first you get the reverse effect) (8)
16. Replace OH in sulfuric acid with NH2 to make this monobasic acid (8)
18. This shows an increase in atomic radius from F to I (5)
20. Reciprocal of 12. (4)
21. Distinct view of matter (10)
23. What the minus 1 does in kJ mol-1 (7)
24. σ and π are both Greek (7)
25. NMR uses an external one of these (6)
26. Placed your chemicals away for future use (6)
Down
1. Cutlery may be deflagrating or disappearing (5)
2. Property of transition metal compounds (7)
3. An ionization energy of 2081 kJ mol−1 provides one example for this noble gas (4,5)
5. Result of a sloppy titration, or used to light the gas? (5)
6. Random not systematic (7)
7. Soaking wet alkane (9)
10. This keeps all your quiz marks together (9)
13. Electrolyse an ore in molten cryolite to produce this (9)
15. Juggle tend with merit but it acts to move the position of equilibrium in the wrong direction (9)
17. Describing the movement of ions through a salt bridge (7)
19. Dividing line between May and November examination sessions? (7)
21. If this is of eight, it is made of silver (5)
22. Gas constant in a Lewis species describes pungent smoke (5)
You can download a pdf of the crossword grid and clues here.
Solution and notes on a few of the answers
Notes:
1. (down)
Disappearing spoon. The title of a book written by Sam Keen published in 2010. It covers interesting aspects of the periodic table and the title refers to spoons made of gallium which dissolve when used to stir a cup of tea as gallium melts at 30 oC.
Deflagrating spoon A spoon with a long handle which can be lowered into a glass vessel filled with a gas to demonstrate combustion.
8. (across) Charles Alfred Coulson (1910 –1974) was a theoretical chemist concerned with chemical bonding whose work on quantum mechanics led to the modern form of valence bond theory.
21. (down) Pieces of eight A "piece of eight" was an old silver Spanish coin. It was also known as a Spanish dollar or peso. The expression "of eight" came from the fact that it was worth eight Spanish reales.