Hurry this scientist proposed that atoms have a nucleus. thomson
bohr
dalton

rutherford

 it was earnest rutherford  he did the gold foil experiment where he shot alpha particles at gold foil that was supposed to be about 1 atom thick. He expected all the atoms to pass straight through but some bounced back, so he proposed that there was something small dense and positive in atoms aka the nucleus

244

Step-by-step explanation:

x=9 9 x 2 =18 +9 =27 x 9 = 243 +1 = 244