Test 1 Flashcards
Electromagnetic radiations have some characteristics of waves and some characteristics of particles. The [a] the energy (e.g., x-rays and gamma rays), the more they act like particles.
Higher
Electromagnetic radiations have some characteristics of waves and some characteristics of particles.
The [b] the energy, the more they act like waves (e.g., radio waves and microwaves).
Lower
Except for the first shell, a maximum of [X] electrons can exist in the outermost shell of any atom.
8
Frequency and wavelength are [x] related.
Inversely
Gamma rays come from [b] the nucleus.
Inside
If an atom gains an electron it is called a [z] ion.
Negative
If an atom loses an electron it is called a [z] ion.
Positive
In thermionic emission, the [x] shell electrons are released when the filament is heated
Outer
Particals in the [x] travel in waves in a straight path.
electromagnetic spectrum
The correct name that is represented by the letters K, L, M, N, O, P, and Q of an atom are the [x]
electron shells
The electron binding energy decreases as it gets [x] nucleus
further away from
The [u] maintains the vacuum necessary for X-ray production.
glass envelope
The electron is the third principle part of the atom. It has [c] charge.
a negative
The focusing cup has a ___ charge
negative
The letter [x] indicates the electron shell closest to the nucleus.
K
the neutron has ___ charge
no
the proton has a ___ charge
positive
When an atom becomes negatively or positively charged it is usually due to a change in the number of [x]
electrons
When the effective focal spot size is made smaller, the actual focal spot is made [o].
smaller
When x-rays are described, it can be said that they have a [x] wavelength than radio waves
shorter
X-rays are emitted from [a] the nucleus.
outside
[x] is defined as the type of energy in x-rays, radio waves, microwaves, and visible light.
electromagnetic radiation
[z] defines removal of an electron from an atom.
ionization
All of the following are true about the electron except:
It has one unit of negative charge.
It is free to travel from one atoms outermost shell to another.
It is fixed inside the atoms nucleus unable to move.
It exists as the smallest unit of charge.
It is fixed inside the atom s nucleus unable to move.
From what metal are the filament wires in radiographic tubes made?
Tungsten
In a modern rotating anode, the rotor motion is accomplished by the use of a/an:
Induction motor
Necessary properties of x-ray target material include:
High melting point
Should the high voltage/high tension cables extending from the ceiling to the X-ray tube assembly ever be used to move the X-ray equipment?
No
The anode angle is used to reduce the projected focal spot size in relation to the actual focal spot size. This is called the:
line focus principle
