Pre-AP Chemistry Atomic Structure 2nd Chance Review
1) Which of the following has a negative charge?
a.nucleus
b. neutron
c. proton
d. electron
e. alpha particle
2) /in interpreting the results of his “oil drop” experiment in 1909, Robert Millikan was able to
determine what?
a. the charge on the proton
b. that electrically neutral particles, (neutrons) are present in the nuclei of atoms
c. that the masses of protons and neutrons are nearly identical
d. the charge on an electron
e. the extremely dense nature of atoms
3) Which statement regarding the “gold foil” experiment is false?
a. it was performed by Rutherford and his team in the early 20 th century
b. most of the alpha particles passed through the foil undeflected
c. the alpha particles were deflected by electrons
d. it suggested the nuclear (planetary) model of the atom
e. it suggested that atoms are mostly empty space
4) In the gold foil experiment, the fact that most of the alpha particles were not deflected s they
passed through the gold foil indicates what?
a. the nucleus is positively charged
b. the atom is mostly empty space
c. atoms are solid spheres touching each other in the solid state
d. gold is very dense
d. none of the above
5) Ernst Rutherford’s model of the atom did not specifically include which of the following?
a. neutron
b. nucleus
c. proton
d. electron
e. electron or the proton
6) Which of the following particles has the smallest mass?
a. electron
b. proton
c. neutron
d. hydrogen atom
e. hydrogen nucleus
7) What is the correct chronological order of the establishment of the existence of subatomic particles
(left to right = first to last)?
a. neutron; electron; proton
c. neutron; proton; electron
e. electron; proton; neutron
b. electron; neutron; proton
d. proton; neutron; electron
8) Which statement is false ?
a. Ordinary chemical reactions do not involve changes in nuclei
b. Atomic nuclei are very dense
c. Nuclei are positively charged
d. Electrons contribute very little to the mass of an atom
e. The nucleus occupies nearly all the volume of an atom
9) The mass number of an atom tells us the number of which particle(s)
a. protons
b. neutrons
c. protons plus electrons
d. protons plus neutrons e. electrons plus neutrons
10) Isotopes of the same element are different in what way?
a. have different numbers of electrons
b. have different numbers of protons
c. have different atomic numbers
d. have different numbers of neutrons
e. have different nuclear charges
Pre-AP Chemistry Atomic Structure 2nd Chance Review
11) The atomic number of a certain element is 19 and its mass number is 39. Give the chemical
symbol and the number of protons and neutrons.
a. F, 19. 19
b. F, 19, 20
c. K, 19, 20 d. K, 20, 19 e. none of these
12) Which pair of species has the most nearly identical chemical properties?
a. Cl- and Fb. K+ and Na+ c. 16O and 18O d. O and S e. Rb+ and Sr2+
13) Give the number of protons, neutrons, and electrons in an atom of the isotope 2210Ne isotope.
a. 10p, 12n, 10e
b. 10p, 10n, 12e
c. 10p, 12n, 12e
d. 12p, 10n, 12e e. 10p, 22n, 10e
14) Give the number of protons, neutrons, and electrons in the 4121Sc3+ ion.
a. 21p, 20n, 21e
b. 21p, 20n, 18e
c. 21p, 20n, 24e
d.20p, 21n, 17e e. 21p, 41n, 18e
15) Give the number of protons, neutrons and electrons in an atom of the K-41 isotope?
a. 19p, 22n, 22e
b. 41p, 19n, 41e
c. 19o, 22n, 19e d. 19p, 16n, 19e
e. 15p, 26n, 15e
16) Give the number of protons, neutrons, and electrons in the 3416S2-.
a. 16p, 18n, 16e
b. 16p, 18n, 14e c. 16p, 16n, 19e
d. 16p, 18n, 18e e. 34p, 16n, 18e
17) What is the symbol for an atom composed of 17 protons, 20 neutrons, and 17 electrons?
a. 3720Ca
b. 3517Cl
c. 3717Cl
d. 5437Rb
e. 3617Cl
18) What is the symbol for an atom composed of 33 protons, 42 neutrons, and 33 electrons?
a. 4233As
b. 7542Mo
c.6533As
d.4242Mo
e.7533As
19) Consider the 3517Cl isotope. How many neutrons does this isotope contain?
a. 17
b.18
c. 30
d. 35
e. none of these
20) What response includes al the following statements that are true, and no false statements?
I. Isotopes of an element differ only in the number of protons
II. The number of protons in an atom is its atomic number
III. The mass number of an atom is the sum of the number of protons plus electrons.
IV. The volume occupied by the nucleus of an atom represents a large percentage of the total
volume of the atom
a. I and III
b. II, III, and IV
c. II and IV
d. II
e. I and IV
21) Why is the atomic mass of chlorine 35.4527 instead of exactly 35?
a. Each chlorine atom has an odd number of protons
b. There are two naturally occurring isotopes of chlorine
c. Each isotope of chlorine has a different number of protons
d. Every atom of chlorine has 18 neutrons
e. Chlorine is a diatomic molecule
22) What is the atomic mass of a hypothetical element consisting of two isotopes, one with mass =
64.23 amu and 26.00% abundance, and one with a mass of 64.32 amu?
a. 65.16 amu
b. 64.37 amu
c. 64.96 amu
d. 65.04 amu
e. 64.80 amu
23) If an element consisted of three isotopes in the following relative abundance, what would the
average atomic mass of the element be?
30.00% 37.00 amu
50.00% 38.00 amu
20.00% 40.00 amu
a. 38.00 amu
b. 38.10 amu
c. 38.20 amu
d. 39.98 amu
e. none of these
Pre-AP Chemistry Atomic Structure 2nd Chance Review
24)
25)
Which match is incorrect?
a. De Broglie
predicted that electrons have wave-like properties
b. Rutherford
showed that most of the mass of an atom is in its nucleus
c. Thomson
demonstrated the existence of the neutron
d. Bohr
developed the nuclear model of the atom
e. Millikan
determined the magnitude of the charge on an electron
What is the energy of a photon whose frequency is 5.0 x 10 12 Hz?
26)
What is the wavelength of a photon of light with a frequency of 6.39 x 10 14 Hz?
27)
The energy for a quantum of light is 7.84 x 10 -19J. What is the wavelength of this light?
28)