"I used beta-testers for the quiz and they suggested I remove the uppercase-only requirement" Please, yes. Always do that.
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Haven't even done a basic science class, but the only one I needed to look up was no. 2...
Bump!
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I just built a train with some bundle leftovers for people who are level 2+. Some of these are new(ish) but most are older. A giveaway per day for 3 weeks.
In order to board the train, you must guess / discover the 5 periodic table elements and fill out this quiz. If you've recently passed a semi-basic chemistry course or with the help of some quick googling, you should be able to complete this in no time.
Enjoy!
EDIT: as recommended by several people, I have modified question #2 to better reflect the element's oxidization process.
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