3.1 History of Chemistry

What is the name of the atomic model proposed by John Dalton?

• Billiard Ball Model

• Plum Pudding Model

• Nuclear Model

• Quantum Mechanical Model

Fill in the blank: In reactions, atoms are combined, separated, or ________, according to John Dalton.

• rearranged

• destroyed

• multiplied

• dissolved

Tags

NGSS.HS-PS1-7

Electrical fields and magnetic fields form ________ waves.

• electromagnetic

• mechanical

• sound

• thermal

Tags

NGSS.HS-PS2-5

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Who demonstrated electromagnetic waves in 1887?

• Heinrich Hertz

• James Clerk Maxwell

• Albert Einstein

• Isaac Newton

The unit of frequency (a cycle per second) is named after whom?

• Newton

• Hertz

• Tesla

• Faraday

Tags

NGSS.HS-PS4-1

Who discovered the electron in 1904?

• J. J. Thomson

• Ernest Rutherford

• Niels Bohr

• Marie Curie

The Planetary Model works well for simple atoms but not for larger, more complex atoms.

• True

• False

What does the Quantum Mechanical Model portray the nucleus as being surrounded by?

• An electron cloud

• Protons

• Neutrons

• A solid shell

Who discovered the neutron in 1932?

• James Chadwick

• Ernest Rutherford

• Niels Bohr

• Marie Curie

Neutrons have a ______ charge.

• neutral

• positive

• negative

• double