Help I feel like I’m dead I’m alive but I’m dead x-x BUT FR HELP

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

How are the terms group and period used on the periodic table

What is the oxidation state of each individual carbon atom in c2o42−?