Translation:There are protons, neutrons, and electrons in an atom
I think you mean, "There ARE protons, neutrons, and electrons in atoms." (-Unless it's Hydrogen ?)
There is in hydrogen-2.
Also, as much as this course is underdeveloped, I do appreciate having a fun lesson like this. I don't think I know the word for atom in the other four languages I've taken on here. Wanted to appreciate the positive, as sometimes people complain a lot about the errors in beta.
....in the atom (marked wrong) unless there's a Swahili "the". Please fix :)