ELCS Exam 1 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
who discovered X-rays? & what was he awarded? - CORRECT ANSWER Wilhelm
Conrad Roentgen
First Nobel Prize in physics
when did Roentgen discover x-rays? - CORRECT ANSWER 1895
what types of nature is an x-ray? - CORRECT ANSWER unknown nature (X-4=12)
when was the 1st dental radiograph taken? - CORRECT ANSWER 1896
Name the what occurs after pushing the exposure button for an x-ray - CORRECT
ANSWER 1. ELECTRONS are produced at the CATHODE
2. electrons are accelerated across to the anode
3. strikes the anode causing heat + x-ray energy (x-ray formed here)
4. x-ray exits via window, through aluminum disks (removes long wavelength)
5. size is restricted at the lead collimator
6. Travels down PID
7. some x-ray is absorbed by patient, and some pass through to transfer energy to a film or a
sensor
___ is anything that occupies space and has mass - CORRECT ANSWER matter
when matter is altered what is the result - CORRECT ANSWER energy
___ is the fundamental unit of matter. This is considered invisible particles. It also has a
nucleus and orbiting electrons. - CORRECT ANSWER atom
, A nucleus is a dense core that consist of: - CORRECT ANSWER protons: positive
electric charge
neutrons: no electric charge
The nucleus occupies ____ space - CORRECT ANSWER little
How do you calculate atomic weight? - CORRECT ANSWER protons + neutrons
How do you calculate atomic number? - CORRECT ANSWER # protons
# electrons = # _____ - CORRECT ANSWER protons
electrons are ____ charged - CORRECT ANSWER negatively
____ travels around the nucleus in orbits or shells. They maintain orbit by the attraction to (+)
protons. - CORRECT ANSWER electrons (negatively charged)
what are molecules? - CORRECT ANSWER two or more atoms joined by a chemical
bond
EX: hydrogen + hydrogen + oxygen = H2O
Most atoms are ____. - CORRECT ANSWER neutral.. meaning the # protons = #
electrons
___ : atom gains or loses an electron - CORRECT ANSWER Ion
EX: when an atom loses an electron the atom becomes a positive ion (now protons >
electrons)
electron is a negative ion.
EX: Na+
QUESTIONS AND CORRECT ANSWERS
who discovered X-rays? & what was he awarded? - CORRECT ANSWER Wilhelm
Conrad Roentgen
First Nobel Prize in physics
when did Roentgen discover x-rays? - CORRECT ANSWER 1895
what types of nature is an x-ray? - CORRECT ANSWER unknown nature (X-4=12)
when was the 1st dental radiograph taken? - CORRECT ANSWER 1896
Name the what occurs after pushing the exposure button for an x-ray - CORRECT
ANSWER 1. ELECTRONS are produced at the CATHODE
2. electrons are accelerated across to the anode
3. strikes the anode causing heat + x-ray energy (x-ray formed here)
4. x-ray exits via window, through aluminum disks (removes long wavelength)
5. size is restricted at the lead collimator
6. Travels down PID
7. some x-ray is absorbed by patient, and some pass through to transfer energy to a film or a
sensor
___ is anything that occupies space and has mass - CORRECT ANSWER matter
when matter is altered what is the result - CORRECT ANSWER energy
___ is the fundamental unit of matter. This is considered invisible particles. It also has a
nucleus and orbiting electrons. - CORRECT ANSWER atom
, A nucleus is a dense core that consist of: - CORRECT ANSWER protons: positive
electric charge
neutrons: no electric charge
The nucleus occupies ____ space - CORRECT ANSWER little
How do you calculate atomic weight? - CORRECT ANSWER protons + neutrons
How do you calculate atomic number? - CORRECT ANSWER # protons
# electrons = # _____ - CORRECT ANSWER protons
electrons are ____ charged - CORRECT ANSWER negatively
____ travels around the nucleus in orbits or shells. They maintain orbit by the attraction to (+)
protons. - CORRECT ANSWER electrons (negatively charged)
what are molecules? - CORRECT ANSWER two or more atoms joined by a chemical
bond
EX: hydrogen + hydrogen + oxygen = H2O
Most atoms are ____. - CORRECT ANSWER neutral.. meaning the # protons = #
electrons
___ : atom gains or loses an electron - CORRECT ANSWER Ion
EX: when an atom loses an electron the atom becomes a positive ion (now protons >
electrons)
electron is a negative ion.
EX: Na+
