Which of the following scientist and discoveries stablished that the nucleus was at the center of the atom and it primarily held the atom's mass? Rutherford's gold foil experiment Rutherford's plum pudding model J. J. Thomson's cathode ray tube experiment. Chadwick's gold foil experiment. O Rutherford's cathode ray tube experiment.

2. Which of the following best describes an element? a. A neutral substance consisting of a cation and an anion b. A substance consisting of two non-metals C. A substance consisting only of atoms having the same nur of protons. d. A substance that can only be found as a solid e. A substance consisting only of atoms having the same num of neutrons O a O b O c dl

Which idea came out of Rutherford’s gold foil experiment?a) Atoms contain protons and neutrons.b) Matter is composed of atoms. c) Elements have isotopes.d) Atoms are mostly empty space.

Match the discovery/ideas/experiment to the contributor Found evidence that the atom is mostly empty space Rutherford Discovered the electron Thompson Used the cathode ray experiment to further the theory of the atom Dalton Democritus Was a philosopher Was the first to have the idea that matter was not infinitely divisible Discovered the nucleus Used the gold foil experiment to further the theory of the atom Was the first to use science to back up the idea of the atom

Rutherford’s gold foil experiment gave scientists clues to the composition of the atom. One thing the experiment DID NOT model was

Which information did Millikan contribute to the understanding of electrons?   A:He determined that electrons do not move in specific orbits around the nucleus. B:He determined the amount of charge on an electron. C:He determined the ratio of mass to charge for electrons. D:He determined that electrons absorb or release specific amounts of energy.

Who conducted experiments to determine the numerical quantity of charge carried by an electron? Rutherford Millikan Thomson Dalton

What did the scientists who are credited with discovering the proton and neutron have in common?

Sketch Ernest Rutherford's gold foil experiment design .

All parts of Dalton's theory on atoms is still accepted today. True O False