Chapter 4

Question 1

New Zealand physicist Rutherford and his colleagues in England demonstrated the existence of the very small but massive nucleus inside every atom in which crucial experiment?

Answer 1

Deflection and occasional reflection. Backward if energetic nuclear particles from a beam aimed at a thin metal sheet

Question 2

The basic makeup I am atom is

Answer 2

Small negatively charged particles orbiting around a central positive charge

Question 3

The parameter of an atom that defines it’s unique position in the periodic table

Answer 3

of protons in the nucleus

Question 4

Process hat results in an ionized atom

Answer 4

An electron has been removed

Question 5

Bohr’s model if hydrogen atom, light is emitted whenever an electron

Answer 5

Jumps from an upper to a lower energy level or orbit

Question 6

Electrons in atoms

Answer 6

Occupy levels whose energies are fixed

Question 7

The specific colors of light emitted by an atom in a hot, thin gas are caused by

Answer 7

Electrons jumping to lower energy levels, losing energy as they do so

Question 8

When electrons jump from higher levels in hydrogen atoms to the level n=2 the resulting spectrum will consist of a

Answer 8

Series of spectral lines, some in he visible range, the Balmer series

Question 9

According to modern atomic theory, light emitted by atoms originates from

Answer 9

Transitions of electrons between electron levels of the same atom

Question 10

Because of the Doppler effect, the sound if the engines of an aircraft that flies over us

Answer 10

Changes from a high pitch or frequency to a lower pitch

Question 11

The Doppler effect is

Answer 11

Increase in observed wavelength of light if the source of light is moving away from you

Question 12

When EM radiation is Doppler shifted by motion of he source away from the detector, the measured

Answer 12

Wavelength is longer than the emitted wavelength

Question 13

When an object is moving toward you, the visible light it emits is Doppler shifted toward the

Answer 13

Ultraviolet

Question 14

When an object is moving away from you, the visible light it emits is Doppler shifted toward the

Answer 14

Infrared

Question 15

…every line appears at a slightly longer wavelength, shifted tower he red end of the spectrum. What conclusion can be drawn from this observation?

Answer 15

The star is moving rapidly away from Earth