history of atomic theories

The word 'atomos' termed by Democritus means:

• Indivisible
• Unconscious
• Blue
• Nuclear powered

Which of these is part of Dalton's atomic theory?

• Every element is identical on the atomic level

• Atoms are made of elements

• Two atoms of the same element are identical

• Atoms never interact with other atoms

The Gold Foil experiment FIRST led to the discovery of the…

• Atom
• Electron
• Neutron
• Nucleus

What was the charge of the alpha particles in the Gold Foil experiment?

• Neutral
• Positive
• Unknown
• Negative

What's the difference between these two atomic models?

• The Bohr model has specific paths for the electrons, whereas the Rutherford model just has electrons wherever

• The Bohr model has a nucleus and the Rutherford model doesn't

• The Rutherford model has electrons because Rutherford discovered the electron

• Rutherford's model is slightly smaller because Bohr felt like he deserved it

The Bohr model is the first atomic model to describe electron shells. What does this mean?

• Calcium carbonate exoskeletons to protect the electrons from predators

• Special places the electron can be without the nucleus interfering

• Levels and paths that the electrons travel around when they orbit the nucleus

• Quantum spin probabilities which account for electron momentum

Which is NOT a feature of the Bohr model?

• Nucleus in the middle

• Electrons on specific paths

• Electrons orbiting the nucleus

• Neutrons in the nucleus

• More than 1 electron

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.

Which scientist proposed the first atomic theory based on scientific evidence?

• J.J. Thomson

• John Dalton

• Ernest Rutherford

• Niels Bohr

According to Dalton's Atomic Theory, atoms of the same element are:

• Different in mass and properties

• Indivisible and indestructible

• Identical in mass and properties

• Made up of protons, neutrons, and electrons