The History of Atomic Theory

The History of Atomic Theory

Multiple Choice

The root word “di” means “two,” so the word “diatomic” refers to _____.

• forces within the atom

• a molecule with two atoms

• negatively-charged electrons

• positively-charged protons

Multiple Choice

In paragraph 2, attraction and repulsion refer to _____.

• electric and magnetic fields

• atomic theories

• tiny particles

• solid atoms

Multiple Choice

How did Ernest Rutherford's experiment relate to J.J. Thomson's work?

• Rutherford looked for magnetic fields, while Thomson looked for electric fields.

• Rutherford repeated Thomson's experiment and confirmed the results.

• Rutherford tested a conclusion based on Thomson's results.

• Rutherford had not known about Thomson's experiment.

Multiple Choice

Which scientist discovered the neutron and gave us the current basic model of the atom?

• James Maxwell

• John Dalton

• James Chadwick

• Sir Isaac Newton

Multiple Choice

What contribution did J.J. Thomson make to the development of atomic theory?

• said that atoms are solid masses

• showed that electrons surround a dense nucleus

• found that atoms are made of smaller particles

• proposed that atoms contain electric fields