Which experiment led to the idea that atoms contained a nucleus? A J. J. Thomson's cathode ray experiment

B. Emest Rutherford's gold foil experiment

C. Niels Bohr's photoelectric effect experiment

D. Robert Millikan's oil drop experiment

Which other elements contain the same number of outer electrons as sodium

Select the correct answer from each drop-down menu. describe what happens to a carbon-11 atom when it undergoes positron emission. the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

Acontrol during an experiment. might change remains constant does not exist does change