Multiple Choice
Identify the choice that best completes the
statement or answers the question.
|
|
|
1.
|
The nucleus of an atom contains
a. | only electrons. | b. | only neutrons. | c. | protons and
neutrons. | d. | protons and electrons. | e. | only protons. |
|
|
|
2.
|
The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. What is the
mass number of sodium?
|
|
|
3.
|
The atomic number of an atom is
a. | the number of protons in the atom. | b. | the number of neutrons in the
atom. | c. | the net electrical charge of the atom. | d. | the number of protons, electrons, and neutrons
in the atom. | e. | the number of electrons in the atom. |
|
|
|
4.
|
Typically, nitrogen atoms are composed of seven electrons, seven protons, and
seven neutrons. An isotope of nitrogen will
a. | be positively charged. | b. | be negatively charged. | c. | have more ar less
than seven neutrons. | d. | have more than seven electrons and more than
seven protons. | e. | have more than seven protons. |
|
|
|
5.
|
A radioactive isotope is one that
a. | decays. | b. | is stable. | c. | has more electrons
than the common variant of the element. | d. | has more protons than the common variant of the
element. | e. | has the same atomic mass, but a different atomic number than the common variant of
the element. |
|
|
|
6.
|
The farther an electron is from the nucleus, the
a. | more unstable the isotope. | b. | lower the atomic number. | c. | more likely it is to
be radioactive. | d. | greater its energy. | e. | more inert the
atom. |
|
|
|
7.
|
Looking at the average atomic mass of silicon, which of the following are the
most likely occurring combinations of isotopes of Silicon?
a. | 14Si and 14.086Si | b. | The most common will
be 28.086Si | c. | 28Si, 29Si and
possibly 27Si | d. | 28.0Si, 28.1Si
| e. | none of the above are possible |
|
|
|
8.
|
Using a mass spectrometer to identify the mass of element X, you detected a mass
of 56.34. This mass was 65.6% of the sample. There was additional mass detected at 57.42. This mass
was 34.4% of the sample. Which of the following correctly show the calculations of the average atomic
mass?
a. | (56.34 + 57.42 * 65.6) /34.4 = average atomic mass | b. | (56.34 * .656) +
(57.42 *.344)/56.88= average atomic mass
| c. | (56.34 * .656) + (57.42 *.344) = average atomic
mass
| d. | (56.34 *.347) + (57.42 * .756) = average atomic mass | e. | both A and D are the
correct calculation |
|
|
|
9.
|
How many protons are in a chloride ion 37Cl- with atomic number of
17?
|
|
|
10.
|
Given the following: 15P3-, 17Cl-,
20Ca2+, all have the same number of ---?
a. | Protons | b. | Neutrons | c. | Electrons | d. | Isotopes | e. | They are completely
different. |
|
|
|
 The following questions refer to the
atom above. It IS NOT a real element. Do not base your answers on the periodic table,
only on the information provided above.
|
|
|
11.
|
Which of the following are true about this element.
a. | This atom will become negative when bombarded with electrons. | b. | In its neutral state
this atom will bend down in a mass spec because it has 10 protons. | c. | This atom has a
positive dense core. | d. | All of the above are true. | e. | None of the above
are true. |
|
|
|
12.
|
Which of the following are true about the De atom.
a. | It can only produce 10 spectral lines because it has 10
electrons. | b. | It can only produce 13 spectral lines because it has 13
electrons. | c. | It will usually have either 13 or 14 electrons. | d. | It is likely to
produce some spectral lines that cannot be seen by the human eye. | e. | None of the above
are true. |
|
|
|
13.
|
Which of the following are true about the De atom, with our current understaning
of the atomic model.
a. | When excited it can produce any frequency of photon. | b. | The electrons can
only exist in certain energy states. | c. | The electrons exist only as
waves. | d. | B and C are correct. | e. | None of the obove are
correct. |
|
|
|
 The following questions refer to the JJ
Thompsons experiments using the cathode ray tube. This was the first apparatus that we, as a
class, looked at.
|
|
|
14.
|
Which of the following are true about this experiment.
a. | When a magnet was placed over the device the negatively charged bent downward because
they were attracted to the south pole. | b. | The electrons glowed green when they hit the
Hydrogen gas in the tube. | c. | The electrons emmitted photons as they passed
from the negative side to the positive side. | d. | Both b and c are true. | e. | All of the above are
true. | f. | None of the above are true. |
|
|
|
15.
|
The Rutherford Gold Foil Experiment was instrumental in the discovery of the
structure of the atom. The experiment involved positive alpha paricles and gold foil. Which of
the following is true.
1. The particle “shot” at the gold foil was positively
charged
2. The shot particle was repelled by the negative charge in the gold
foil
3. The shot particle was repelled by the positive charge found in the nucleus of the
atoms making up the gold foil.
4. The shot particle moved easily through the “pudding
like” mass of the positive charge of the nucleus in 100% of all trials.
a. | 1 and 2 are true | b. | 1 and 4 are true | c. | 1 and 3 are
true | d. | 2 is true | e. | All statements are
false. |
|