Review for Test 1: History of the Atom

The electron cloud shows areas of high ___________ of finding electrons.

• probability

• temperature

• mass

• volume

What is the center of the atom called?

• Electron cloud

• Nucleus

• Proton

• Neutron

Who introduced the Quantum Model in 1926, describing electrons as clouds of probability in orbitals?

• Schrodinger

• Bohr

• Dalton

• Rutherford

Neutrons are ________ charged and located in the __________.

• Positively, nucleus

• Negatively, electron cloud

• Neutrally, nucleus

• Positively, electron cloud

Which scientist suggested that matter was made of four elements (earth, water, fire, air)?

• Aristotle

• Niels Bohr

• John Dalton

• Ernest Rutherford

Which of the following particles has no electric charge?

• Proton

• Electron

• Neutron

• Electron Cloud

Who discovered the nucleus using the gold foil experiment?

• Ernest Rutherford

• Niels Bohr

• John Dalton

• Aristotle

Which of the following is found outside of the nucleus of an atom?

• Electron

• Proton

• Quark

• Energy Level

Who proposed that electrons travel in fixed orbits around the nucleus?

• Niels Bohr

• J.J. Thomson

• Aristotle

• John Dalton

Which philosopher argued in 300 BC that matter is made of earth, fire, water, and air, and whose idea dominated for nearly 2,000 years?

• Aristotle

• Democritus

• Bohr

• Rutherford