121 Module 1 Study Guide

 In a characteristic interaction, kinetic energy of the incident electron must be __ of the electron is knock out orbit

When comparing the x-ray emission spectrum between beams produced at 70 kVp and 110 kVp,

entirely concentrated in the nucleus

Quarks may behave according to the ____ theory.

All of the following are preferred cathode filament materials EXCEPT

 Calculate the velocity of red light with a wavelength of approximately 4.0 nm (nm = 10⁻⁹).

 The orderly arrangement of elements in the periodic table is based upon

possesses a negative charge and minute mass

What percentage of target interaction results in the production of x-ray photons?

highly penetrating based upon frequency

Filament materials are chosen primarily for their

an expression of wavelength

To cover a 14 in. 17 ft field at 40 ft, a ____-degree target angle is required.

 All of the following are true of electromagnetic energies EXCEPT:

Elements having the same principal quantum number are in this order.

A change in the number of these changes the identity of the element.

Melting of the anode commonly occurs

In the excitation process, electrons in an atom are moved to a/an ____ energy state.

 An electron is ____ charged and has a mass of ____ amu(s)

The most common diagnostic radiography x-ray tube target angle is ____ degrees.

Bremsstrahlung interactions may occur only when the incident electron interacts with

 X-rays are characterized as

 In character interaction, dropping of a hi-energy state electron to a low-energy state “hole” results in this emission

the transference of energy to an atom

 Pitting of the anode commonly occurs

expressed as the height of the wave

The area of the focal spot that is projected out of the tube toward the object being radiographed is the

A gain or loss of this atomic particle creates an isotope.

When x-raying wedge shaped anatomy such as a femur, the thicker portion is positioned where

can be long wavelengths in kilometers

 All of the following are true of the substance glucose (C₆H₁₂O₆) EXCEPT:

It is determined by the number of electrons in the outermost shell of an atom.

 If the photon frequency of electromagnetic radiation is increased tenfold, then the

 The exact point on the anode where the x-ray beam emanates is the

Tungsten is the anode material of choice for x-ray production because of its

Driving the thermionic cloud from the cathode to the anode requires

An effective technology used in pulsed fluoroscopy to produce precise electron streams from the cathode is

 Filament materials are chosen primarily for their

Electrons moving around in specific orbitals demonstrate this energy.

Insulation of hi-volt components of tube & absorption of heat produced by x-ray production are achieved through use of

 The sum of protons and neutrons in a nucleus is called the

 Electrons traveling from the cathode filament to the anode are called

The emission spectrum of an x-ray beam from a tungsten anode consists of

 As the angle of the anode increases and the incident electron beam size remains the same, the effective focal spot size

 The atomic number is the number of ____ contained in the nucleus.

It has a mass number of 207.

the product of frequency and wavelength

 The K shell can hold a maximum of ____ electrons.  

 An atom has an atomic # of 18 & a mass # of 38. P= # of protons & N = # of neutrons, what is the isotope of this atom

In order to time the x-ray exposure with rapid inspiration on an infant

As electrons build up in the area of filament, the neg. charges oppose the emission of more electrons. This is known as

elements having the same chemical characteristics

For the element molybdenum, the effective energy of characteristic interactions is

 Characteristic interactions may occur only when the incident electron interacts with

 What type of radiation is composed of photons not produced at the actual focal spot?

 The energy of a bremsstrahlung photon is

The maximum number of electrons in a period with a principal quantum number of 4 is

Which of the following is not a basic characteristic of the wave equation?

When the frequency of a wave is 1,000 hertz & travels at 50,000 m/sec, the wavelength is

 A period in the periodic table is

X-ray photon production occurs at the

The only portion of the anode assembly placed outside the vacuum of glass envelope is the

 According to the “rule of octets,”

an “L” to “K” transition would yield 31.45 keV of energy

isotope of boron has 5 protons and 6 neutrons. The atomic number of boron is

increases as the number of electrons and protons increases

 The nuclear components that distinguish one element from another are the

Its k-shell binding energy is −33.17 keV.

All of the following are part of the cathode assembly EXCEPT

 Electromagnetic radiation with a frequency of 2,000 hertz would have a wavelength of

 Tungsten is the material of choice for the source of x-ray photons primarily because of its