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Which of the following are incorrect statements about the atom?
A. Atoms have been around since the beginning of the universe.
B.Atoms are mostly empty space.
C.Atoms are perpetually moving.
D.Atoms are manufactured in plants, and in humans during pregnancy. |
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| D.Atoms are manufactured in plants, and in humans during pregnancy. |
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The atomic number of an element matches the number of
A. protons in the nucleus of an atom.
B.electrons in a neutral atom.
C.both of the above.
none of the above |
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A nucleus with an atomic number of 44 and a mass number of 100 must have
A. 44 neutrons.
B.56 neutrons.
C.100 neutrons.
D.none of the above. |
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Each spectral line in an atomic spectrum represents
A. a specific frequency of light emitted by an element.
B.one of the many colors of an element.
C.a pattern characteristic of the element.
D.all of the above. |
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| A. a specific frequency of light emitted by an element. |
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The hydrogen spectrum consists of many spectral lines. How can this simple element have so many lines?
A. One electron can be boosted to many different energy levels.
B.The electron can move at a variety of speeds.
C.The electron can vibrate at a variety of frequencies.
D.Many standing electron waves can fit in the shell of the hydrogen atom. |
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Definition
| A. One electron can be boosted to many different energy levels. |
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When an atom is excited, its
A. electrons are boosted to higher energy levels.
B.atoms are charged with light energy.
C.atoms are made to shake, rattle, and roll.
D.none of the above. |
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Definition
| A. electrons are boosted to higher energy levels. |
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The frequencies of light emitted by an atom often add up to
A. a higher frequency of light emitted by the same atom.
B.a lower frequency of light emitted by the same atom.
C.both of the above.
D.none of the above. |
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Definition
| A. a higher frequency of light emitted by the same atom. |
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In the relationship E~¦, the symbol ¦ stands for the frequency of emitted light, and E stands for the
A. potential energy of the electron emitting the light.
B.energy of the photon.
C.kinetic energy of the photon.
D.all of the above. |
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Which of these has the greatest energy per photon?
A. Red light.
B.Green light.
C.Blue light.
D.All have the same. |
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Which of these photons has the smallest energy?
A. Infrared.
B.Visible.
C.Ultraviolet.
D.All have the same. |
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Which of the following is a quantum number?
A. 0.02
B.0.2
C.2
D.2.5 |
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Which are older, the atoms in the body of an elderly person or those in the body of a baby?
•A) The baby’s atoms are older because this is surely a trick question
•B) The elderly person’s atoms are older because the person has been around much longer
•C) the atoms are of the same age, which is appreciably older than the solar system
•D) it depends on their diet |
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Definition
| C) the atoms are of the same age, which is appreciably older than the solar system |
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You could swallow a capsule of germanium, Ge (atomic number 32), without significant ill effects. If a proton were added to each germanium nucleus, however you would not want to swallow the capsule because the germanium would
•A)become arsenic
•B) become radioactive
•C) expand and likely lodge into your throat
•D) change in flavor |
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If an atom were the size of a baseball, its nucleus would be the size of
•A) a walnut
•B) a raisin
•C) a flea
•D) an atom |
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Why are the atomic masses listed in the periodic table not whole numbers?
•A) scientist have yet to make the precise measurements
•B) that would be too much of a coincidence
•C) The atomic masses are average atomic masses
•D) Today’s instruments can measure the atomic masses to many decimal places |
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Definition
| C) The atomic masses are average atomic masses |
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An element found in another galaxy exists as two isotopes. If 80% of the atoms have an atomic mass of 80.00 amu and the other 20% have an atomic mass of 82.00 amu, what is the approximate atomic mass of the element?
•A)80.4 amu
•B) 81.0 amu
•C) 81.6 amu |
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List the following atoms in order of increasing atomic size: thallium, Tl; germanium, Ge; tin, Se; phosphorus, P.
•A) Ge<P<Sn<Tl
•B) Tl<Sn<P<Ge
•C) Tl<Sn<Ge<P
•D) P<Ge<Sn<Tl |
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Would you use a physical model or a conceptual model to describe each of the following: the brain; the mind; the solar system; the beginning of the universe?
•A) conceptual; conceptual; conceptual; conceptual;
•B) conceptual; physical; conceptual; physical;
•C) physical; conceptual; physical; conceptual
•D) physical; physical; physical; physical |
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| C) physical; conceptual; physical; conceptual |
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How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values
•A) Electrons can vibrate only at particular frequencies
•B) When an electron wave is confined, it is reinforced only at particular frequencies
•C) The energy values of an electron occur only where its wave properties have a maximum amplitude |
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Definition
| B) When an electron wave is confined, it is reinforced only at particular frequencies |
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How can a hydrogen atom, which has only one electron, have so many spectral lines?
•A) The electron can move at various speeds
•B) The protons in the nucleus are also giving off various light frequencies
•C) one electron can be boosted to many different energy levels |
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Definition
| C) one electron can be boosted to many different energy levels |
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How many electrons are there in the third shell of sodium, Na (atomic number 11)?
•A) none
•B) one
•C) two
•D) three |
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