Why is it important for egg and sperm cells to join in fertilization

Two things that biomedical has invented or innovated

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.

Find the mass, in grams, of 5.00*10^23 molecules of f2