A wedge is plane that is inclined on it's side. I hope this helps.
It allowed him to realize that the mass of an atom is concentrated at its center because the atoms mostly went through the foil but some were deflected. He also realized that an atom probably wasn't just empty space and scattered electron and it had a positive center.
It would be atomic masses of the same atoms, and that atoms will be isotopes.
Adding 15 g of Flubber with 85 g of inert solvent will result in the formation of 15 % solution.
Glad to help you :)
-liyah❤
