Physical Science Chapter 14
Physical science. Yes.
- 1.The electron has no mass
- A.
True
- B.
False
- 2.The red photons found in the emission spectrum of atomic hydrogen are less energetic than the purple photons
- A.
True
- B.
False
- 3.The rare, backward reflection of alpha particles convinced Rutheford that the atom consisted of a dense, positively- charged nucleus.
- A.
True
- B.
False
- 4.In gas discharge tube experiments, positive fragments from different types of atoms are similar to one another.
- A.
True
- B.
False
- 5.To explain the continuous spectrum, Planck proposed that light could only be absorbed or emitted in discrete amounts.
- A.
True
- B.
False
- 6.Bohr failed to explain why an accelerated electron does not radiate energy.
- A.
True
- B.
False
- 7.Rutherford fully expected alpha particles to bounce off of the gold foil.
- A.
True
- B.
False
- 8.The nucleus of an atom occupies more than half of the atom's volume.
- A.
True
- B.
False
- 9.The color of a hot object is related to its temperature.
- A.
True
- B.
False
- 10.Dense, positively- charged center of the atom.
- 11.Rutherford model
- 12.Spectra in which the colors of light change abruptly and many colors are missing
- 13.Thomson Model
- 14.Positively charged particle emitted by some radioactive materials
- 15.The conservation of ________ law explains why photon emission occurs when an electron drops from a high to a low energy state.
- 16.Thomson's and Millikan's experiments provided strong evidence for the atom's _________ nature.
- 17.Rutherford's orbits were _________________: Bohr's orbits were __________.
- 18.An electron with a large value of n in the Bohr model is ______________ from the nucleus and has ___________ of energy.
- 19.The nature functions using discrete rather than continuous energy is an assumption of the _________ model.
- 20.Thomson's gas discharge experiments provide direct experimental evidence for the
- A.
Exclusion principle
- B.
Nuclear model of atoms
- C.
Bohr model of atoms
- D.
Idea that all atoms are made of charged particles
- E.
Idea that electrons in atoms behave as waves
- 21.In the Thomson (plum pudding) model of the atom, an atom is described as
- A.
A positive "pudding" with small lumps of negative charge distributed throughout
- B.
A negative "pudding" with small lumps of positive charge distributed throughout
- C.
A negative "pudding" with one large lump of positive charge in the middle
- D.
A neutral "pudding" with lumps of negative charge around the outside and lumps of positive charge in the middle
- 22.In what model do electrons orbit the nucleus so that any orbit allowed by Newtonian physics can be occupied by an electron?
- A.
Quantum model
- B.
Thomson or "plum pudding" model
- C.
Rutherfod or "solar system" model
- D.
Bohr or "modified solar system" model
- E.
Molecular model
- 23.White light passes through a gas that absorbs some of the light. The spectrum of light that passes through the gas is then analyzed. The spectrum could best be described as
- A.
Continuous
- B.
A discrete spectrum of colored lines
- C.
A mostly continuous spectrum that is missing some colors
- D.
A discrete spectrum of colored lines that corresponds to the absorbed light
- E.
A completely black spectrum
- 24.Gases emit light when they are energized by an electrical discharge. The light results when an electron
- A.
"jumps" from one energy level up to a higher energy level
- B.
"jumps" from one energy level down to a lower energy level
- C.
Is completely removed from the atom
- D.
Is absorbed b the nucleus
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