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LRA 211 Questions and Correct Answers
Joseph (JJ) Thomson Ans: Developed "plum pudding model"
Interactions in x-ray tube Ans: Happen at atomic level
Ernest Rutherford Ans: Model resembling tiny solar system
Niels Bohr Ans: Atoms have 3 particles Protons, Neutrons, and
electrons
binding energy Ans: Energy needed to split up and atom
Electron binding energy depends on Ans: How close the electron
is to the nucleus and how many protons are in the atom
Electron closer to nucleus has Ans: High energy
electron shells (energy levels) Ans: K L M N O P
2n^2 Ans: maximum number of electrons within a shell
IsotoPes Ans: same protons, different neutrons
IsotoNes Ans: same neutrons, different protons
Isobars Ans: Different protons, same total # of protons and
neutrons
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Isomers Ans: Same protons and neutrons, different energy
Cation Ans: loses electrons, positive charge
Anion Ans: gains electrons, negative charge
More complex atom Ans: the greater the opportunity for
interaction
Atomic number- atomic mass Ans: # of neutrons
Period (left to right) Ans: Same number of electron shells
down the periodic table Ans: Shell number increase
left to right periodic table Ans: electronegativity increases
Ionic bond Ans: the attraction between oppositely charged ions
Covalent bond Ans: two atoms share electrons (figure 8)
Wavelength Ans: Peak to peak (METERS)
Frequency Ans: Valley to valley (Hertz)
electromagnetic radiation travels Ans: At speed of light
Energy= Ans: Planck's constant x frequency (hf)
X-rays originate between Ans: Electrons and Atoms
© 2025 All rights reserved
LRA 211 Questions and Correct Answers
Joseph (JJ) Thomson Ans: Developed "plum pudding model"
Interactions in x-ray tube Ans: Happen at atomic level
Ernest Rutherford Ans: Model resembling tiny solar system
Niels Bohr Ans: Atoms have 3 particles Protons, Neutrons, and
electrons
binding energy Ans: Energy needed to split up and atom
Electron binding energy depends on Ans: How close the electron
is to the nucleus and how many protons are in the atom
Electron closer to nucleus has Ans: High energy
electron shells (energy levels) Ans: K L M N O P
2n^2 Ans: maximum number of electrons within a shell
IsotoPes Ans: same protons, different neutrons
IsotoNes Ans: same neutrons, different protons
Isobars Ans: Different protons, same total # of protons and
neutrons
© 2025 All rights reserved
, 2 | Page
Isomers Ans: Same protons and neutrons, different energy
Cation Ans: loses electrons, positive charge
Anion Ans: gains electrons, negative charge
More complex atom Ans: the greater the opportunity for
interaction
Atomic number- atomic mass Ans: # of neutrons
Period (left to right) Ans: Same number of electron shells
down the periodic table Ans: Shell number increase
left to right periodic table Ans: electronegativity increases
Ionic bond Ans: the attraction between oppositely charged ions
Covalent bond Ans: two atoms share electrons (figure 8)
Wavelength Ans: Peak to peak (METERS)
Frequency Ans: Valley to valley (Hertz)
electromagnetic radiation travels Ans: At speed of light
Energy= Ans: Planck's constant x frequency (hf)
X-rays originate between Ans: Electrons and Atoms
© 2025 All rights reserved
