Essential Concepts of Radiologic Science

Question 1

This refers to anything that occupies space and has mass.

Answer 1

Matter

Question 2

Fundamental building blocks of matter which are arranged in various complex ways.

Answer 2

Atoms

Question 3

The distinguishing characteristic of matter. It is also the quantity of matter contained in any physical object.

It is described by its energy equivalence.

Answer 3

Mass

Question 4

It is the force exerted on a body under the influence of gravity

Answer 4

Weight

Question 5

What is the scientific unit of Mass?

Answer 5

kilograms (kg)

Question 6

It is the ability to do work

Answer 6

Energy

Question 7

The International System (SI) unit of measurement of energy.

Answer 7

joules (J)

Question 8

Unit of measurement of energy used in radiology.

Answer 8

electron volt (eV)

Question 9

the ability to do work by virtue

of position

Answer 9

Potential energy

Question 10

the energy of motion

Answer 10

Kinetic energy

Question 11

the energy released by a chemical

reaction

Answer 11

Chemical energy

Question 12

An energy produced when an electron moves through an electric potential difference (voltage)

Answer 12

Electrical energy

Question 13

Normal household electricity involves the movement of electrons through a copper
wire by an electric potential difference of how many volts (V).

Answer 13

110 V

Question 14

the energy of motion at the
molecular level. It is the kinetic energy of molecules and
is closely related to temperature

Answer 14

Thermal energy (heat)

Question 15

the energy that is contained within

the nucleus of an atom

Answer 15

Nuclear energy

Question 16

The most important energy in radiology. It is the type of energy that is
used in x-ray imaging

Answer 16

Electromagnetic energy

Question 17

Which of the following is/are not electromagnetic energy?

X-ray
gamma ray
radio waves
sound
microwaves 
ultrasound
ultraviolet
infrared,
visible light

Answer 17

sound

ultrasound

Question 18

What is the formula of Albert Einstein’s mass-energy equivalence?

Answer 18

E = mc^2

Question 19

E = mc^2

E=?
m=?
c=?

Answer 19

E = energy
m = mass
c = velocity/speed of electromagnetic radiation (light)

Question 20

It is the transfer of energy.

Energy emitted and transferred through space

Answer 20

Radiation

Question 21

Term used to describe matter that intercepts and absorbs part or all of radiation

Answer 21

exposed or irradiated

Question 22

any type of radiation that is capable of removing an orbital electron from
the atom with which it interacts

Answer 22

Ionizing radiation

Question 23

This refers to the orbital electron and the atom from which it was separated from as a result of ionization.

Answer 23

ion pair

Question 24

Which of the following is NOT true about ion pair?

A. This refers to the orbital electron and the atom from which it was separated from as a result of ionization.
B. The electron is a negative ion, and the remaining atom is a positive ion.
C. The electron is a negative ion, and the remaining atom can either be a positive or negative ion.

Answer 24

C. The electron is a negative ion, and the remaining atom can either be a positive or negative ion.

Question 25

It is the removal of an electron from an

atom

Answer 25

Ionization

Question 26

Which of the following is/are not considered as electromagnetic radiation with sufficient energy to ionize?

x-ray
gamma ray
alpha rays
beta rays
UV light

Answer 26

alpha rays
beta rays

Rationale: Alpha and beta rays have sufficient energy to ionize. However, they are particle-type and not electromagnetic radiation