No.
Tween
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Yes! A tween is a boy/girl ages 10-12. There is also a tweenager category :) of course, it is called tween from "between". Between a kid and a teen so its tween. Once you turn 13, then your a teenager. And, trust me! lol, im 13 and being a teenager can really STINK sometimes :D
A number between 0 and 1 is a fraction.
yes, nothing prevents you from having exponents that also have exponents. In the case that you ask about, of ten to the ten to the ten, that would be better expressed as ten to the ten billion, or 1010,000,000,000.
Ten million ten thousand and ten. There I said it. It's not that hard it is 10,010,010. so ha.