Physical Science Test 3

Quantum mechanics is a branch of physics that deals with

Developed the nuclear model

which of the following scientists suggested that cathode rays were made of (-) charged particl

discovered electrons using crookes tubes

The earliest record of a particle theory of matter is from the

"weighted average" means atomic mass

JJ Thompson discovered the existance of the

Isotopes of an element always have the same number of protons

Most of an atom consists of empty space.

Rutherford's gold foil experiments gave rise to which atomic model?

thoughts of indivisible " atomos"

the number of protons found in the nucleus of a given element

The Bohr model suggests that electrons move

Carbon-14 is different from carbon-12 in that it has a different number of ___________.

What is J.J. Thompson atomic model called?

In Rutherfords experiments, a beam of ________________ was directed a piece of gold foil.

Which of the following is a weighted average?

Aritstole first called particles atomos, from which we get our word atom.

What is the currently accepted model of the atom?

believed that electrons move through spherical regions located a fixed diance from the nucleus