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43) How many protons (p) and neutrons (n) are in an atom of Ra?
A) 88 p, 138 n
B) 88 p, 226 n
C) 138 p, 88 n
D) 226 p, 88 n
44) 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
45) What is the element symbol for an atom that has 33 protons and 41 neutrons?
A) As
B) Nb
C) O
D) W
46) How many electrons are in a neutral atom of iodine–131?
A) 1
B) 53
C) 54
D) 131
47) Identify the chemical symbol of element Q in Q.
A) As
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B) Mo
C) Os
D) Se
48) Which are isotopes? An atom that has an atomic number of 35 and a mass number of 76 is an isotope
of an atom that has
A) an atomic number of 31 and a mass number of 76.
B) an atomic number of 35 and a mass number of 80.
C) 41 neutrons and 35 protons.
D) 41 protons and 35 neutrons.
49) The isotope represented by C is named
A) carbon-6.
B) carbon-3.
C) carbon-9.
D) carbon-15.
50) A bottle of pure element was missing part of a label. The label said 2.258 x 1023 atoms. You
determine the mass of the elements in the bottle to be 10.51946. What is the identity of this element?
A) B
B) N
C) Si
D) Sr
51) What is the standard isotope that is used to define the number of atoms in a mole?
A) 14N
B) 12C
C) 9Be
D) 31P
52) The number of atoms of carbon in 28 g of silicon is
A) 28
B) 28 × 6.022 × 1022
C) 2.8 × 1023
D) 6.022 × 1023
53) One mole of which element has the smallest mass?
A) Co
B) Zn
C) Ni
D) Ru
54) 24.0 g of which element contains the greatest number of atoms?
A) Be
B) C
C) O
D) Na
55) A banana split is an example of
A) a compound.
B) an element.
C) a mixture.
D) an ion.
56) Hydrochloric acid is an example of
A) a compound.
B) an element.
C) an ion.
D) a mixture.
57) Iodine is an example of
A) a compound.
B) an element.
C) a mixture.
D) an ion.
58) Water is an example of
A) a compound.
B) an element.
C) a mixture.
D) an ion.
59) A cake is an example of
A) a compound.
B) an element.
C) mixture.
D) an an anion.
60) Orange juice is an example of
A) a compound.
B) an element.
C) an ion.
D) a mixture.
61) Aluminum is an example of
A) a compound.
B) an element.
C) a mixture.
D) an ion.
62) Ethane is an example of
A) a compound.
B) an element.
C) a mixture.
D) a cation.
63) In which set do all elements tend to form cations in binary ionic compounds?
A) Li, B, O
B) Mg, Cr, Pb
C) N, As, Bi
D) O, F, Cl
64) How many electrons are in the ion, Fe2+?
A) 24
B) 26
C) 28
D) 56
65) How many electrons are in the ion, S2-?
A) 14
B) 18
C) 30
D) 34
66) In which of the following sets do all species have the same number of electrons?
A) Cl–, Ar, Ca2+
B) N, O2-, F–
C) Sc3+, Y3+, La3+
D) Cr, Cr2+, Cr3+
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67) In which of the following sets do all species have the same number of protons?
A) At–, Rn, Ra2+
B) C, N3-, O2-
C) CO3+, Rh3+, Ir3+
D) Br, Co2+, Co3+
68) In which of the following sets do all species have the same number of electrons?
A) I–, Xe, Cs2+
B) C, N3-, O2-
C) Mg2+, Ca2+, Ba2+
D) S, S2–, S2+
69) In which of the following sets do all species have the same number of protons?
A) Br–, Kr, Rb2+
B) C, N3-, O2-
C) Mg2+, Ca2+, Ba2+
D) O, O2-, O2+
70) What is the identity of element Q if the ion Q2+ contains 18 electrons?
A) Si
B) S
C) Ar
D) Ca
71) How many electrons are in the ion, SO42-?
A) 26
B) 46
C) 48
D) 50
72) In which set do all elements tend to form anions in binary ionic compounds?
A) Cs, B, O
B) Ca, Zn, Pb
C) N, Sb, Bi
D) S, Cl, Br
73) What type of bonding is found in the compound NH3?
A) covalent bonding
B) hydrogen bonding
C) ionic bonding
D) metallic bonding
74) Which one of the following compounds contains ionic bonds?
A) MgO
B) HCl
C) PCl3
D) CO2
75) Which of the following is the correct chemical formula for a molecule of iodine?
A) I
B) I–
C) I+
D) I2
76) Which of the compounds, Ca H2, H2O , C H4, XeF4 are ionic compounds?
A) only C H4
B) only Ca H2
C) Ca H2 and Xe F4
D) H2O , C H4, and XeF4
77) Which of the compounds C2H6, CaCl2, Cu(NO3)2, OF2 are expected to exist as molecules?
A) only C2H6
B) C2H6 and OF2
C) C2H6, Cu(NO3)2, and OF2
D) CaCl2 and Cu(NO3)2
78) Which of the following elements has the least tendency to form an ion?
A) Be
B) H
C) He
D) O
79) The solid compound, Na4SiO4, contains
A) Na+, Si4+, and O2- ions.
B) Na+ ions and SiO44– ions.
C) Na4+ and SiO44- ions.
D) Na4SiO4 molecules.
80) What is the chemical formula for nickel(II) phosphate?
A) Ni2P
B) Ni2PO4
C) Ni3P2
D) Ni3(PO4)2
81) What is the charge on the Sc ions in Sc2O3?
A) 2-
B) 1+
C) 2+
D) 3+
82) Na2S is named
A) sodium disulfide.
B) sodium sulfide.
C) sodium(II) sulfide.
D) sodium sulfur.
83) What is the chemical formula for strontium hydroxide?
A) SrH2
B) SrOH
C) SrOH2
D) Sr(OH)2
84) What is the chemical formula for radium hydride?
A) RaH2
B) RaOH
C) RaOH2
D) Ra(OH)2
85) An aqueous solution of H Cl is named
A) hydrochloric acid.
B) hydrochlorous acid.
C) chloric acid.
D) chlorous acid.
86) The chemical formula for the nitrite ion is
A) N2-.
B) N 3-.
C) NO2–.
D) NO3–.
87) The chemical formula for rubidium peroxide is
A) RbOH.
B) RbO2.
C) Rb2O.
D) Rb2O2.
88) The compound, Cu(I O3 )2, is named
A) copper iodate(II).
B) copper(I) iodate.
C) copper(I) iodate(II).
D) copper(II) iodate.
89) The compound, ClO , is named
A) chlorite.
B) hypochlorite.
C) chlorine monoxide.
D) chlorine (II) oxide.
90) The ion, NO2–, is named
A) nitrate ion.
B) nitrite ion.
C) nitrogen dioxide ion.
D) nitrogen(II) oxide ion.