physics exam 5 Pt. 2

The Heisenberg uncertainty principle states that

ATA

The first to be credited with the idea that light is quantized was

Albert Einstein.

In a smoke detector americium (A = 95) transmutes to neptunium (A = 93) by

alpha emission.

Radium (A = 88) transmutes to radon (A = 86) by

alpha emission.

When Rutherford directed a stream of alpha particles at a gold foil, some particles

bounced back. deflected at a variety of angles. continued through the foil.

A device that shows the bending of particle trails in liquid hydrogen is a

bubble chamber.

Both electrons and protons have equal-magnitude

charge.

Cosmic rays originate in the

cosmos.

The most harmful radiations are those that

damage living cells.

The sources of X-rays are

electron clouds.

Which wavelengths are shortest?

gamma ray.

The radioactive half-life of a material is the time for

half of an original quantity of the material to decay. its decay rate to reduce to half.

Rays with the shortest wavelengths have the

highest frequencies and energies.

The spectral lines of atomic spectra are

images of the slit in a spectroscope. as an identity of atoms as fingerprints are of people. orderly, and even predictable.

All deposits of natural uranium contain appreciable amounts of

lead.

The sources of both X-rays and gamma rays are

neither of these

Which of the following is quantized?

number of atoms in a gold bar energy radiation electric charge

In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the

number of ejected electrons.

The high temperature of Earth's interior is mainly due to

radioactive processes.

Which produces an interference pattern when directed through two suitably spaced slits?

sound light electrons

When uranium emits a beta particle, the result is

the first transuranic element.

Most of the radioactivity we personally encounter originates from

the natural environment.

In the equation E = hf, the symbol f stands for

wave frequency.

The thing that "waves" in the Schrödinger equation is a

wave function

Unlike Bohr, Schrödinger viewed electrons as

waves.