125) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing
(1), which drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4)
126) If shaded and unshaded spheres represent atoms of different elements, as shown in drawing
(1), which combination of drawings (2)-(4) represent the law of multiple proportions?
A) only drawings (2) and (3)
B) only drawings (2) and (4)
C) only drawings (3) and (4)
D) drawings (2), (3), and (4)
127) Which of the following figures represents H? Unshaded spheres represent neutrons and
shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4)
128) Which of the following figures represents B? Unshaded spheres represent neutrons and
shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4)
129) Which of the following figures represents N ? Unshaded spheres represent neutrons and
shaded spheres represent protons.
A) figure (1)
B) figure (2)
C) figure (3)
D) figure (4)
130) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
131) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
132) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
133) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
134) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
135) Tell the type of decay process occurring in the following nuclear reaction.
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
136) What kind of decay process is occurring in the decay of isotope A to isotope B in the figure
shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
137) What kind of decay process is occurring in the decay of isotope B to isotope C in the figure
shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
138) What kind of decay process is occurring in the decay of isotope C to isotope D in the figure
shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
139) What kind of decay process is occurring in the decay of isotope D to isotope E in the figure
shown above?
A) α emission
B) β emission
C) γ emission
D) electron capture or positron emission
1.2 Algorithmic Questions
1) What is the chemical symbol for antimony?
A) At
B) Sb
C) Sn
D) Am
2) What is the chemical symbol for manganese?
A) Hg
B) Mg
C) Mn
D) Na
3) What is the chemical symbol for platinum?
A) P
B) Pa
C) Pt
D) Pu
4) Which element has the chemical symbol, P?
A) lead
B) phosphorus
C) platinum
D) potassium
5) Which element has the chemical symbol, Au?
A) aluminum
B) argon
C) gold
D) silver
6) Sodium belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
7) Fluorine belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
8) Xenon belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
9) Radium belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
10) Which of the following elements has chemical properties similar to oxygen?
A) fluorine
B) hydrogen
C) nitrogen
D) sulfur
11) Which of the following elements is a gas at room temperature?
A) bromine
B) iron
C) krypton
D) sodium
12) Which of the following elements is not a solid at room temperature?
A) Ag
B) Al
C) Ne
D) Fe
13) Which of the following elements is classified as a semimetal?
A) calcium
B) silicon
C) fluorine
D) uranium
14) Which of the following elements is a good conductor of heat and electricity?
A) carbon
B) chlorine
C) neon
D) silver
15) Which one of the following elements is a poor conductor of heat and electricity?
A) copper
B) phosphorus
C) iron
D) lead
16) All of the following elements are nonmetals except
A) arsenic.
B) carbon.
C) hydrogen.
D) oxygen.
17) A sample of pure lithium chloride contains 16.4% lithium by mass. What is the % lithium by
mass in a sample of pure lithium carbonate that has twice the mass of the first sample?
A) 8.20%
B) 16.4%
C) 32.8%
D) 65.6%
18) A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How
much calcium is contained in 30.0 g of calcium fluoride?
A) 1.71 g
B) 7.70 g
C) 15.0 g
D) 15.4 g
19) Elements A and Q form two compounds, AQ and A2Q3. The mass ratio (mass Q)/(mass A)
for AQ is 0.286. What is the mass ratio (mass Q)/(mass A) for A2Q3?
A) 0.191
B) 0.429
C) 2.33
D) 5.24
20) Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an
isotope of an atom that has
A) an atomic number of 32 and a mass number of 76.
B) an atomic number of 34 and a mass number of 80.
C) 42 neutrons and 34 protons.
D) 42 protons and 34 neutrons.
21) Which of the following represent isotopes?
A:
46
21
[ ] B:
46
22
[ ] C:
[ ] D:
48
23
[ ]
A) A and B
B) A and C
C) A and D
D) C and D
22) How many protons (p) and neutrons (n) are in an atom of Tc?
A) 43 p, 55 n
B) 43 p, 98 n
C) 55 p, 43 n
D) 98 p, 43 n
23) How many protons (p) and neutrons (n) are in an atom of calcium-46?
A) 20 p, 26 n
B) 20 p, 46 n
C) 26 p, 20 n
D) 46 p, 20 n
24) What is the element symbol for an atom that has 33 protons and 41 neutrons?
A) As
B) Nb
C) O
D) W
25) How many electrons are in a neutral atom of iodine-131?
A) 1
B) 53
C) 54
D) 131
26) Identify the chemical symbol of element Q in Q.
A) As
B) Cl
C) P
D) S
27) Copper has 2 naturally occuring isotopes, copper-63 with an atomic mass of 62.9296 and
copper-65 with an atomic mass of 64.9279 amu. What is the percent abundance of copper-63?
A) 69.2%
B) 30.8%
C) 51.8%
D) 48.2%
28) The number of nucleons in a Th nucleus is
A) 90.
B) 144.
C) 234.
D) 324.
29) Beta decay of 32P produces a beta particle and
A) 28Al.
B) 31P.
C) 32Si.
D) 32S.
30) In addition to a beta particle, what is the other product of beta decay of I?
A) Sb
B) Te
C) Xe
D) Cs
1.3 Short Answer Questions
1) The symbol for mercury is ________.
2) The element Se can be found in period ________ and group ________ of the periodic table.
3) Sodium is an example of an ________ metal that reacts with water to form hydrogen gas and
an ________ solution.
53
4) Atoms of the same element always have the same number of ________ in their nuclei.
5) Isotopes have the same number of ________ but different numbers of ________ in their
nuclei.
6) The number of neutrons in a neutral atom of uranium-238 is ________.
7) The number of protons, neutrons, and total nucleons in Ru are ________, ________, and
________, respectively.
8) U undergoes alpha decay producing one alpha particle and a single nuclide. To balance
the equation ________ and ________ must be added to the right side of the equation below.
U → ? + ?