Atomic Theory Aristotle to Rutherford 2019

Early ideas of matter being composed of earth, wind, water, and fire were proposed by

• Democritus

• Zeus

• Einstein

• Aristotle

Democritus was a philosopher who opposed Aristotle; his idea of the atom was that it was made of indivisible particles called

• atomos

• matter

• indivison

• stuff

JJ Thomson was credited for the discovery of the

• center of the universe

• proton

• electron

• neutron

Which device did JJ Thomson use to discover the electron?

• X-ray machine

• scanning tunneling electron microscope

• spectrometer

• cathode ray tube

The atomic model associated with Thomson is the

• plum pudding model

• nuclear mode.

• planetary model

• the electron cloud model

The CRT when powered up produces a beam that is

• red in color and positively charged.

• magnetic and negatively charged.

• deflected only when exposed to certain frequencies of light.

• red, blue, or green.

The CRT was also known as the ____________ in the early 1950's through the 1990's.

• radio

• refrigerator

• MRI used in hospitals

• TV

If a magnet is placed next to a cathode ray the ray or beam will be

• absorbed by the magnet.

• transformed to potential energy.

• less intense and blue in color.

• deflected by the magnetic field.

In what location did Rutherford suggest the electrons were located?

• in the nucleus.

• outside the nucleus.

• only where the alpha particles were deflected.

• outside the atom after they collided with the alpha particle.

What is the electrical charge of the anode?

• positive

• negative

• neutral

• unknown