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Midterm Review
Atomic Concepts- Purple
Periodic Table- Pink
Chemical Bonding- Yellow
Behavior of Matter- Blue
• You can only have out a: Periodic Table and a
Calculator
• The team that answers the most questions
correctly will receive bonus points
• NO Notes or Working with other groups!
1. Compared to the charge and mass of a
proton, an electron has:
1. the same charge and a smaller mass
2. the same charge and the same mass
3. an opposite charge and a smaller mass
4. an opposite charge and the same mass
2. When alpha particles are used to bombard
gold foil, most of the alpha particles pass
through undeflected. This result indicates that
most of the volume of a gold atom consists of
____.
1. deuterons
2. neutrons
3. protons
4. unoccupied space
3. A proton has approximately the same mass as
1. a neutron
2. an alpha particle
3. a beta particle
4. an electron
4. When electrons in an atom in an excited state
fall to lower energy levels, energy is
1. absorbed, only
2. released, only
3. neither released nor absorbed
4. both released and absorbed
5. A neutron has approximately the same mass
as a
1. an alpha particle
2. a beta particle
3. an electron
4. a proton
6. Which symbols represent atoms that are
isotopes?
1. C-14 and N-14
2. O-16 and O-18
3. I-131 and I-131
4. Rn-222 and Ra-222
7. Which element's ionic radius is smaller than
its atomic radius?
1. neon
2. nitrogen
3. sodium
4. sulfur
8. Which atom contains exactly 15 protons?
1. P-32
2. S-32
3. O-15
4. N-15
9. An ion with 5 protons, 6 neutrons, and a
charge of 3+ has an atomic number of
1. 5
2. 6
3. 8
4. 11
10. What is the mass number of an atom which
contains 28 protons, 28 electrons, and 34
neutrons?
1. 28
2. 56
3. 62
4. 90
11. Which three groups of the Periodic Table
contain the most elements classified as
metalloids (semimetals)?
1. 1, 2, and 13
2. 2, 13, and 14
3. 14, 15, and 16
4. 16, 17, and 18
12. Which element has the highest first
ionization energy?
1. sodium
2. aluminum
3. calcium
4. phosphorus
13. Which compound forms a colored aqueous
solution?
1. CaCl2
2. CrCl3
3. NaOH
4. KBr
14. When a metal atom combines with a
nonmetal atom, the nonmetal atom will
1. lose electrons and decrease in size
2. lose electrons and increase in size
3. gain electrons and decrease in size
4. gain electrons and increase in size
15. According to Reference Table S, which of the
following elements has the smallest atomic
radius?
1. nickel
2. cobalt
3. calcium
4. potassium
16. Which element in Group 15 has the
strongest metallic character?
1. Bi
2. As
3. P
4. N
17. Which halogens are gases at STP?
1. chlorine and fluorine
2. chlorine and bromine
3. iodine and fluorine
4. iodine and bromine
18. When combining with nonmetallic atoms,
metallic atoms generally will
1. lose electrons and form negative ions
2. lose electrons and form positive ions
3. gain electrons and from negative ions
4. gain electrons and form positive ions
19. Which set of elements contains a metalloid?
1. K, Mn, As, Ar
2. Li, Mg, Ca, Kr
3. Ba, Ag, Sn, Xe
4. Fr, F, O, Rn
20. Atoms of elements in a group on the
Periodic Table have similar chemical properties.
This similarity is most closely related to the
atoms‘
1. number of principal energy levels
2. number of valence electrons
3. atomic numbers
4. atomic masses
21. As atoms of elements in Group 16 are
considered in order from top to bottom, the
electronegativity of each successive element
1. decreases
2. increases
3. remains the same
22. The first ionization energy of an element is
737 kJ per mole of atoms. An atom of this
element in the ground state has a total of how
many valence electrons?
1. 1
2. 2
3. 3
4. 4
23. An atom of which of the following elements
has the greatest ability to attract electrons?
1. silicon
2. sulfur
3. nitrogen
4. chlorine
24. At STP, which substance is the best
conductor of electricity?
1. nitrogen
2. neon
3. sulfur
4. silver
25. Which metal is obtained commercially by the
electrolysis of salt?
1. Zn
2. K
3. Fe
4. Ag
26. Which element can be found in nature in the
free (uncombined) state?
1. Ca
2. Ba
3. Au
4. Al
27. Which formula represents a molecular
substance?
1. CaO
2. CO
3. Li2O
4. Al2O3
28. Which sequence of Group 18 elements
demonstrates a gradual decrease in the strength
of the Van der Waals forces? All the choices are
elements in the liquid state.
1. Ar, Kr, Ne, Xe
2. Kr, Xe, Ar, Ne
3. Ne, Ar, Kr, Xe
4. Xe, Kr, Ar, Ne
29. Which substance is not an example of an
allotrope?
1. Diamond and Graphite
2. Different colored samples of phosphorus
3. Oxygen gas (O2) and Ozone (O3)
4. Sodium and Potassium
30. Which combination of atoms can form a
polar covalent bond?
1. H and H
2. H and Br
3. N and N
4. Na and Br
31. A strontium atom differs from a strontium
ion in that the atom has a greater
1. number of electrons
2. number of protons
3. atomic number
4. mass number
32. Which bond has the greatest ionic
character?
1. H---Cl
2. H---F
3. H---O
4. H---N
33. Which gas is monatomic at STP?
1. chlorine
2. fluorine
3. neon
4. nitrogen
34. What Kelvin temperature is equal to 25°C?
1. 248 K
2. 298 K
3. 100 K
4. 200 K
35. As ice cools from 273 K to 263 K, the average
kinetic energy of its molecules will
1. decrease
2. increase
3. remain the same
36. The phase change represented by the
equation I2 (s) ----> I2 (g) is called
1. sublimation
2. condensation
3. melting
4. boiling
37. What is the total number of joules of heat
energy absorbed by 15 grams of water when it is
heated from 30°C to 40°C?
1. 10
2. 63
3. 150
4. 630
38. A compound differs from a mixture in that a
compound always has a
1. homogeneous composition
2. maximum of two components
3. minimum of three components
4. heterogeneous composition
39. Which substance cannot be decomposed
into simpler substances?
1. ammonia
2. aluminum
3. methane
4. methanol
40. How many joules are equivalent to 35
kilojoules?
1. 0.035 joules
2. 0.35 joules
3. 3,500 joules
4. 35,000 joules
41. Which statement describes a chemical
property?
1. Its crystals are a metallic gray.
2. It dissolves in alcohol.
3. It forms a violet-colored gas.
4. It reacts with hydrogen to form a gas.
42. Which measurement contains three
significant figures?
1. 0.08 cm
2. 0.080 cm
3. 800 cm
4. 8.08 cm
43. A student investigated the physical and
chemical properties of a sample of unknown gas
and then investigated the gas. Which statement
represents a conclusion rather than an
experimental observation?
1. The gas is colorless.
2. The gas is carbon dioxide.
3. When the gas is bubbled in limewater, the
liquid becomes cloudy.
4. When placed in the gas, a flaming splint
stops burning.
44. A student determined the heat of fusion of
water to be 366.9 J/g. If the accepted value is
333.3J/g, what is the student's percent error?
1. 8.0%
2. 10.0%
3. 15%
4. 30.0%
45. In an experiment, a student found 18.6% by
mass of water in a sample of BaCl2 * 2H2O. The
accepted value is 14.8%. What was the student's
experimental percent error?
1. 3.8 / 18.6 x 100
2. 3.8 / 14. 8 x 100
3. 14.8 / 18.6 x 100
4. 18.6 / 14.8 x 100
46. What is the sum of
6.6412 g + 12.85 + 0.046 g + 3.48 g
Expressed to the correct number of significant
figures?
1. 23 g
2. 23.0 g
3. 23.017 g
4. 23.02 g
Answers
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
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21.
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24.
25.
3
4
1
2
4
2
3
1
1
3
3
4
2
4
1
1
1
2
1
2
1
2
4
4
2
26. 3
27. 2
28. 4
29. 4
30. 2
31. 1
32. 2
33. 3
34. 2
35. 1
36. 3
37. 4
38. 1
39. 2
40.1
41.4
42.4
43. 2
44. 2
45. 2
46. 4