Chapter 7: Understanding the Atom

Which of the following is NOT a developer of an atomic model?

• Dalton

• Planck

• Rutherford

• Thomson

Which of the following determined that cathode rays are negatively charged?

• Aristotle

• Dalton

• Rutherford

• Thomson

Which of the following found that atoms have a nucleus?

• Aristotle

• Dalton

• Rutherford

• Thomson

Which of the following was invented in 1981 and allowed scientists to first see individual atoms?

• scanning tunneling microscope

• atomic microscope

• scanning telescope

• visualizing microscope

The three basic components of an atom are _____.

• protons, neutrons, and ions

• protons, neutrons, and electrons

• protons, neutrinos, and ions

• protium, deuterium, and tritium

The nucleus of an atom consists of _____.

• electrons

• neutrons

• protons and neutrons

• protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

A single proton has which electrical charge?

• no charge

• positive charge

• negative charge

• either a positive or a negative charge

Tags

NGSS.MS-PS2-3

Which two particles would be attracted to each other?

• electrons and neutrons

• electrons and protons

• protons and neutrons

• All particles are attracted to each other.

When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles ____.

• were deflected by the foil

• bounced back from the foil

• were absorbed by the foil

• passed straight through the foil

Which item best represents Dalton’s mental image of an atom?

• a cork

• a candy bar with nuts

• a marble

• a balloon full of air