PHYSICS QUIZ 7
When a gamma ray is emitted by a nucleus, the nucleus then has less
energy
Which experiment best demonstrates the particle-like nature of light?
photoelectric effect
The mass of an atomic nucleon is nearly
two thousand times the mass of an electron.
In the equation E = hf, the f stands for
wave frequency as defined for sound, radio, and light waves.
An element will decay to an element with higher atomic number in the periodic table if it emits
a beta particle.
The fact that iron absorption lines occur in the solar spectrum directly indicates that there is iron in the solar
atmosphere.
In which of these processes is an element of matter changed into a completely different element?
both of these
Two photons are emitted as an electron de-excites from the third quantum level to the second, and then to the ground state. The sum of the frequencies of the two photons equals the frequency of the single photon that would be emitted if the de-excitation were from the third to the ground state directly. This is according to
both of these
Energy released by the sun results from the process wherein atomic nuclei
combine.
Carbon 14 is produced in the atmosphere principally by
cosmic-ray bombardment.
In the fissioning of uranium, a chain reaction is caused by
ejected neutrons.
When an element undergoes nuclear transmutation, the result is a completely different
element.
Discrete spectral lines occur when excitation takes place in a
gas.
When the hydrogen isotope tritium-3 emits a beta particle, it becomes an isotope of
helium.
When a lump of uranium is broken into smaller pieces, the total surface area of the lump
increases.
Uranium-235, uranium-238 and uranium-239 are different
isotopes.
The energy release in both fission and fusion is mainly in the form of
kinetic energy of fragments.
In nuclear fission and nuclear fusion reactions, the amount of mass converted to energy of other forms is
less than 1%.
In the process of fluorescence, the input is high-frequency light and the output is
lower-frequency light.
Compared to the energy produced by fissioning a gram of uranium, the energy produced by fusing a gram of deuterium is
more.
Compared to protons, the reason neutrons are effective nuclear bullets in nuclear reactions is that a neutron has
none of these
A nucleon has more mass when it is
outside the nucleus.
Atoms of neon in a glass tube can be excited
over and over again.
Two beams of light, a red beam and a blue beam, have the same energy. The beam with the greater number of photons is the
red beam.
As a solid is gradually heated, the first color to glow is
red.
To say that energy levels in an atom are discrete is to say the energy levels are well defined and
separate from one another.
The function of graphite in the first atomic reactor was to
slow fast neutrons.
When a beta particle is ejected from a nucleus, the nucleus then has slightly
smaller mass and significantly greater charge.
