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# Cambridge Chemistry Challenge watch

1. (Original post by Snakefingers13)
Clues:

Roentgenium: What importance does the number 53 have to chemistry? Compare it with the others after you have a link.

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53 Iodine? Am I looking in completely the wrong place?
2. (Original post by Oromis263)
See here for the best advice.
Thanks It's as simple as ABC :P
3. (Original post by lpdsr)
i put the sum and it says 'its not sigma, but pi!'. i multiply and the result isnt right!
You may have the wrong numbers even if the sum is right.
Just because a+b+c = d+e+f does not mean that abc = def
4. (Original post by lpdsr)
i put the sum and it says 'its not sigma, but pi!'. i multiply and the result isnt right!
if you're using your calculator it won't work because there aren't enough digits - try it in excel or on a computer calculator
been there done that...
5. Ugh, I'm struggling with Rg still. Any chance of a more specific clue? :/
6. (Original post by GallifreyanSwamp)
Ugh, I'm struggling with Rg still. Any chance of a more specific clue? :/
write out the numbers and see if you can write down something to do with those numbers that is to do with Mosely and is fundamental to chemistry. Can you see any patterns in what you've written down?
it's as simple as ABC :P not so much the nth letter of the alphabet but the nth e****** of the p******* t****
7. That. Is. Really. Annoying!
It's exactly the same sum as I had over an hour ago, but because I was doing it on my calculator my answer wasn't to the desired amount of sig figs
Everyone, use Excel and put in every last sig fig!
8. Got it, eventually. God that Rg was frustrating. That isn't the standard of question I expected, it's something you either click or you don't click with. :/ ah well, Took me far too long. thanks for the help guys, and here's a hint for those of you still stuck, or not yet started: It's got more digits than you can get on a calculator screen, and you should think about how the way we build a language is similar to how we build a molecule.
9. (Original post by jennywren42681)
it's as simple as ABC :P
I should have got that /so/ much earlier. Ah well.
10. Me and a few friends have been going a Rg for a couple of hours now and we are still completely clueless as to what we need to do after trying to figure out what other people have said on this thread
11. well, I give up on Rg... good thing that only the best 5 scores count
12. What are you supposed to do with SH and OH for Silver?? I've tried multiplying their mass numbers and proton numbers... what else? (Also done with S and O)
13. Can anyone tell me what is the value of the 9 pi thing? Thank You
14. Dont Worry! Got it
15. (Original post by GallifreyanSwamp)
I should have got that /so/ much earlier. Ah well.
I'd appreciate if you masters helped me a little bit. By 'ABC' are you suggesting that it has something to do with the lettering of the elements with the atomic numbers in the sequence? How does this link to Henry Moseley?
Thank you
16. (Original post by Llewellyn)
You may have the wrong numbers even if the sum is right.
Just because a+b+c = d+e+f does not mean that abc = def
Do you have the value? May I have a hint please?
17. (Original post by TheRocker)
Do you have the value? May I have a hint please?
It's very very big. Use excel for the correct amount of sig figs

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18. (Original post by david2457)
It's very very big. Use excel for the correct amount of sig figs

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19. (Original post by david2457)
It's very very big. Use excel for the correct amount of sig figs
What is the actual equation you have to use? Im so confused :/

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