Electron Quiz Chapter 8
This is a quiz that queries various random questions that are designed to test your knowledge on electrons. It might not be as easy as you think but just try it out to see how you will do. All the best as you take up the challenge.
- 1.Protons are so much more massive than electrons that you can neglect the mass of electrons when determining the mass of an atom.
- A.
Tru
- B.
False
- 2.Photons of which of the following colors of light possess the greatest amount of energy?
- A.
Blue
- B.
Green
- C.
Red
- D.
Yellow
- 3.An electron moves from one orbital to another only when it absorbs or emits energy.
- A.
True
- B.
False
- C.
Option 3
- D.
Option 4
- 4.The quantum mechanical model of the atom differs from the Bohr model in that it
- A.
Considers the electron as a wave
- B.
States that electrons can only exist at specific distances from the nucleus
- C.
Considers the electron as a particle
- D.
Predicts the specific location of the electron in an atom
- 5.Neutral atoms of a given element have the same
- A.
number of protons
- B.
atomic number
- C.
Number of electrons
- D.
all of the above
- 6.Alpha particles were fired at a gold foil and found to be widely deflected. What can we conclude from that?
- A.
The positive charge in an atom is concentrated in a tiny, but dense nucleus
- B.
Atoms are solid, with spaces between them
- C.
Gold is an element, not a compound as previously believed
- D.
Atoms are electrically neutral
- 7.Protons and neutrons have about the same mass.
- A.
True
- B.
False
- 8.Which one do you like?
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 9.Niel Bohr's model of the hydrogen atom
- A.
Was controversial bc it refuted accepted principles of physics
- B.
Held that electrons existed in allowed orbits and nowhere else
- C.
Accounted for the observed spectrum in hydrogen
- D.
All of the above
- 10.Thomson was convinced that he had discovered a subatomic particle, the electron, from the evidence that
- A.
A. the charge-to-mass ratio was the same for all materials.
- B.
B. cathode rays could move through a vacuum.
- C.
C. electrons were attracted toward a negatively charged plate.
- D.
D. the charge was always 1.60 × 10–19 coulomb.
- 11.The main problem with a solar system model of the atom is that
- A.
A. electrons move in circular, not elliptical orbits.
- B.
B. the electrons should lose energy since they are accelerating
- C.
C. opposite charges should attract one another.
- D.
D. the mass ratio of the nucleus to the electrons is wrong.
- 12.The existence of a tiny, massive, and positively charged nucleus was deduced from the observation that
- A.
A. fast, massive, and positively charged radioactive particles all move straight through metal foil.
- B.
B. radioactive particles were deflected by a magnetic field.
- C.
C. some radioactive particles were deflected by metal foil.
- D.
D. None of the above is correct.
- 13.Rutherford’s estimate of the radius of an atomic nucleus was based on
- A.
A. the drift of oil droplets in an electric field.
- B.
B. speculation about expected symmetry in gold foil.
- C.
C. measurements of radioactive particle deflections from gold foil.
- D.
D. measurements of the breakup of a nitrogen atom by collisions with radioactive particles.
- 14.Atoms of an element that have different numbers of neutrons are called
- A.
A. allotropes.
- B.
B. isomers.
- C.
C. isotopes.
- D.
D. radioactive.
- 15.Atomic weight is
- A.
A. determined by weighing individual atoms.
- B.
B. an average weight of the isotopes of an element.
- C.
C. the number of protons and neutrons in a nucleus.
- D.
D. a weighted average of the masses of isotopes of an element based on abundance.
- 16.In 1910, Max Planck introduced the idea that matter emits and absorbs energy in
- A.
Light waves.
- B.
B. discrete units called quanta.
- C.
C. pulses with no particular pattern.
- D.
d. pulses that vary in magnitude over time.
- 17.The major success of the Bohr theory was in explaining
- A.
A. how electrons move in circular orbits.
- B.
B. why radiationless orbits existed.
- C.
C. the colors in the hydrogen line spectrum.
- D.
D. why the angular momentum of the electron should be by orbit quantum numbers.
- 18.Light from an incandescent gas is dispersed into narrow lines of colors with no light between the lines. This is called a (an)
- A.
Line spectrum
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 19.The basis of the quantum mechanics theory of the atom is
- A.
A. spin and quantum leaps of electron masses.
- B.
B. elliptical orbits of electrons.
- C.
C. how electron particles move in orbits.
- D.
D. the wave nature of electrons.
- 20.The existence of matter waves was proposed by
- A.
De Broglie.
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 21.Any moving particle has a wavelength that is associated with its mass and velocity. This is a statement that proposed the existence of
- A.
A. photoelectric effect.
- B.
B. matter waves.
- C.
C. quanta.
- D.
D. photons.
- 22.The arrangement of electrons in orbitals is called
- A.
A. electron configuration.
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 23.Group IIA elements are called
- A.
A. alkali metals.
- B.
B. alkaline earth metals.
- C.
C. alkaline salts.
- D.
D. beryllium metals.
- 24.The elements in A groups are called
- A.
A. alkali elements.
- B.
b. transition elements.
- C.
C. representative elements.
- D.
D. metals.
- 25.25. The element chlorine belongs to which group?
- A.
A. Alkali metals
- B.
B. Lanthanides
- C.
C. Halogens
- D.
D. Noble gases
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