History of the Atom

Multiple Choice

In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.

• Atoms

• Parts

• Molecules

• Hydrogen

Multiple Choice

Who was the Greek philosopher who called the smallest particle of matter an "atom"?

• Democritus

• Aristotle

• J.J Thompson

• Einstein

Multiple Choice

Which of the following is NOT a part of Dalton's atomic theory?

• All elements are composed of atoms.

• Atoms are always in motion.

• Atoms of the same element are always identical.

• Atoms that combine do so in simple, whole-number ratios.

Multiple Choice

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

• Atom is mostly empty space

• The nucleus is positively charged

• The atom has a small dense nucleus

• All answers are correct

Multiple Choice

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.

• alpha particles have a positive charge.

• gold is not a dense as previously thought.

• there is a dense positively charged nucleus at the center of an atom.

Multiple Choice

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter

• contains negatively charged particles

• has an overall negative charge

• has an overall positive charge