Basics of Atoms and Electricity

Question 1

x-ray was first discovered

Answer 1

by german scientist wilhelm conrad roentgen

Question 2

x-ray properties

Answer 2

-invisible
-electrically neuter
-no mass
-travel at the speed of light in a vacuum
-cannot be focused by a lens
-form a polyenergetic/heterogenous beam
-produced in a range of energies
-travel in straight lines
-cause fluorescence in certain substances
-cause chemical changes to occur in radiographic and photographic film
-can be absorbed or scattered by tissues in the body
-can cause chemical and biological damage to living tissue

Question 3

element

Answer 3

smallest particle of a substance

Question 4

Atom

Answer 4

-mostly empty space
-protons, neutrons, electrons

Question 5

Thermionic emission

Answer 5

effect of boiling off electrons when the x-ray generator is turned on and heat is applied to the cathode

Question 6

Principle characteristic of matter

Answer 6

weight

Question 7

principle characteristic of energy

Answer 7

motion or movement

Question 8

What are two major types of energy used in x-ray technology

Answer 8

electrical energy and electromagnetism

Question 9

X-rays can be described as

Answer 9

waves and particles

Question 10

short wavelengths

Answer 10

will pass a fixed point more frequently

Question 11

long wave length

Answer 11

will pass a fixed point less often