Which of the following was not a conclusion of rutherford’s gold foil experiment?
a. the atom is mainly empty space
b. the nucleus has a negative charge
c. the atom has a dense nucleus
d. alpha particles can pass through a thin sheet of gold foil
e. all of the above are correct regarding the gold foil experiment

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.