Atomic Theory Quiz

Who first proposed the idea that everything in the world was made up of tiny particles surrounded by empty space?

• John Dalton

• J.J. Thompson

• Democritus

• Aristotle

Which scientist showed that common substances always broke down into the same elements in the same proportions?

• John Dalton

• Werner Heisenberg

• Niels Bohr

• Ernest Rutherford

Who discovered the electron in 1897?

• Ernest Rutherford

• J.J. Thompson

• Werner Heisenberg

• Niels Bohr

Who conducted the gold foil experiment and concluded that atoms consisted largely of empty space with a dense nucleus?

• Niels Bohr

• Werner Heisenberg

• Ernest Rutherford

• J.J. Thompson

Who expanded on Rutherford's nuclear model and proposed that electrons orbit the nucleus at fixed energies and distances?

• Niels Bohr

• Werner Heisenberg

• Ernest Rutherford

• J.J. Thompson

Who showed that electrons simultaneously behaved like waves and formulated the uncertainty principle?

• J.J. Thompson

• Niels Bohr

• Werner Heisenberg

• Ernest Rutherford

What did Democritus call the tiny particles that make up everything in the world?

• Neutrons

• Protons

• Atoms

• Molecules

What did John Dalton conclude about the various compounds?

• They were combinations of quarks and leptons

• They were combinations of atoms of different elements

• They were combinations of protons and neutrons

• They were combinations of electrons and positrons

What did J.J. Thompson's model of the atom propose?

• Atoms were made up of four elements: earth, wind, water, and fire

• Atoms were solid spheres with no empty space

• Atoms were indivisible particles

• Atoms were uniformly packed spheres of positive matter filled with negatively charged electrons

What did Rutherford's gold foil experiment reveal about the structure of the atom?

• Atoms were solid spheres with no empty space

• Atoms were uniformly packed spheres of positive matter filled with negatively charged electrons

• Atoms consisted largely of empty space with a dense nucleus

• Atoms were indivisible particles