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13) How many neutrons are there in one atom of 184W?
A) 74
B) 112
C) 258
D) 110
E) 184
14) How many protons are there in one atom of 71Ga?
A) 40
B) 70
C) 71
D) 31
E) 13
15) How many electrons are there in one atom of 71Ga?
A) 40
B) 70
C) 71
D) 31
E) 13
55
16) Which pair of atoms constitutes a pair of isotopes of the same element?
A) X X
B) X X
C) X X
D) X X
E) X X
17) The atomic number of an atom of 80Br is ________.
A) 115
B) 35
C) 45
D) 73
E) 80
18) How many total electrons are in the Li+ ion?
A) 2
B) 3
C) 4
D) 7
E) 8
19) How many total electrons are in the O2- ion?
A) 10
B) 8
C) 9
D) 16
E) 18
20) If a iron atom loses 2 electrons to make an ion, what is the charge on that ion?
A) 2+
B) 1+
C) 3+
D) 2-
E) 1-
21) If an atom gains 3 electrons to make an ion, what is the charge on that ion?
A) 3+
B) 1+
C) 2+
D) 1-
E) 3-
22) An ion has 26 protons, 29 neutrons, and 23 electrons. The symbol for the ion is ________.
A) 55Fe3+
B) 55Fe3-
C) 52Cu3+
D) 52Cu3-
E) 55V3-
23) The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the
isotopes are given in the table below. The average atomic mass of the element is ________ amu.
A) 33.333
B) 220.40
C) 220.24
D) 219.00
E) 219.67
24) The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the
isotopes are given in the table below. The average atomic mass of the element is ________ amu.
A) 159.4
B) 162.0
C) 163.1
D) 161.5
E) 163.0
25) The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the
isotopes are given in the table below. The average atomic mass of the element is ________ amu.
A) 52.62
B) 56.14
C) 55.70
D) 55.40
E) 55.74
26) The element ________ is the most similar to sodium in chemical and physical properties.
A) Mg
B) Br
C) N
D) K
E) Sr
27) Which pair of elements would you expect to exhibit the greatest similarity in their physical and
chemical properties?
A) Li, F
B) Sr, Te
C) O, S
D) In, Sb
E) Ti, Ne
28) Which one of the following is a metalloid?
A) Se
B) Hf
C) Zr
D) Xe
E) Si
29) The element lithium is in a group known as the _______.
A) transition metals
B) alkaline earth metals
C) noble gases
D) halogens
E) alkali metals
30) The element chlorine is in a group known as the _______.
A) transition metals
B) noble gases
C) alkali metals
D) alkaline earth metals
E) halogens
31) The element calcium is in a group known as the _______.
A) transition metals
B) alkali metals
C) halogens
D) noble gases
E) alkaline earth metals
32) Of the following, only ________ is not a metalloid.
A) B
B) Po
C) Si
D) Ge
E) As
33) Which of the following elements is a nonmetal?
A) At
B) Rh
C) Tc
D) Mo
E) Zr
34) Which one of the following will occur as diatomic molecules in elemental form?
A) helium
B) argon
C) chlorine
D) phosphorous
E) sodium
35) How many electrons does the As3- ion possess?
A) 30
B) 36
C) 2
D) 8
E) 33
36) How many protons does the Br- ion possess?
A) 34
B) 36
C) 6
D) 8
E) 35
37) Which one of the following is most likely to gain electrons when forming an ion?
A) Mn
B) Zn
C) F
D) Li
E) Al
38) The formula of a salt is XCl2. The X-ion in this salt has 24 electrons. The metal X is ________.
A) Ni
B) Fe
C) Zn
D) V
E) Pd
39) Predict the charge of the most stable ion of selenium.
A) 3+
B) 1-
C) 2+
D) 2-
E) 1+
40) Predict the charge of the most stable ion of aluminum.
A) 3-
B) 1+
C) 2+
D) 1-
E) 3+
41) Which of the following compounds would you expect to be ionic?
A) C2H6
B) NH3
C) H2O2
D) LiBr
E) None of the above.
42) Which species below is the sulfate ion?
A) CN-
B) SO42-
C) OH-
D) SO32-
E) None of the above
43) Which species below is the nitrate ion?
A) NO2-
B) NO3-
C) ClO3-
D) ClO4-
E) MnO4-
44) Which species below is the chromate ion?
A) Cr2O72-
B) CrO42-
C) CH3COO-
D) CO32-
E) None of the above
45) The correct name for CaO is ________.
A) calcium oxide
B) calcium hydroxide
C) calcium peroxide
D) calcium monoxide
E) calcium dioxide
46) Element M reacts with fluorine to form an ionic compound with the formula MF3. The M-ion has 21
electrons. Element M is ________.
A) Al
B) Cr
C) Mn
D) Fe
E) Sc
47) The charge on the copper ion in the salt CuO is ________.
A) +1
B) +2
C) +4
D) +3
E) +5
48) The charge on the silver ion in the salt AgCl is ________.
A) +2
B) +1
C) +3
D) +4
E) +5
49) The name of the ionic compound NaBrO4 is ________.
A) sodium perbromate
B) sodium bromate
C) sodium hypobromate
D) sodium perbromite
E) sodium bromide
50) When a bromine atom forms the bromide ion, it has the same charge as the ________ ion.
A) sulfide
B) ammonium
C) nitrate
D) phosphate
E) sulfite
51) Which element forms an ion with the same charge as the sulfate ion?
A) magnesium
B) sodium
C) fluorine
D) vanadium
E) sulfur
52) The correct name for Na2O2 is ________.
A) sodium oxide
B) sodium dioxide
C) disodium dioxide
D) sodium peroxide
E) disodium oxide
53) Which metal is not required to have its charge specified in the names of ionic compounds it forms?
A) Cr
B) Ni
C) Zr
D) Na
E) Mo
2.4 Short Answer Questions
1) What group in the periodic table would the fictitious element :: be found?
2) Which element in Group IA is the most electropositive?
3) The formula for potassium sulfide is ________.
4) What is the name of an alcohol derived from hexane?
2.5 True/False Questions
1) The possible oxidation numbers for iron are +1 and +2.
2) The formula for chromium (II) iodide is CrI2.
3) H2SeO4 is called selenic acid.
4) The correct name for Na3N is sodium azide.
