Chem 051 - Chemistry for Allied Health Professionals » Winter 2022 » Quiz 3 Atomic structure

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Question #1
A magnesium, Mg2+, has
A.   12 protons and 10 electrons.
B.   19 protons and 20 electrons
C.   24 protons and 26 electrons.
D.   12 protons and 14 electrons
E.   19 protons and 18 electrons
Question #2
A sulfide ion, S2- , has:
A.   7 protons and 4 electrons
B.   7 protons and 10 electrons
C.   7 protons and 7 electrons
D.   16 protons and 14 electrons
E.   16 protons and 18 electrons
Question #3
An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)
A.   15 p, 16 n, 15 e
B.   16 p, 31 n, 16 e
C.   16 p, 15 n, 16 e
D.   16 p, 16 n, 15 e
E.   32 p, 31 n, 32 e
Question #4
Give the number of protons (p), electrons (e), and neutrons (n) in one atom of chlorine-37.
A.   17 p, 17 e, 37 n
B.   17 p, 17 e, 20 n
C.   37 p, 37 e, 17 n
D.   37 p, 17 e, 20 n
E.   17 p, 37 e, 17 n
Question #5
How many neutrons are there in an atom of lead whose mass number is 208?
A.   290
B.   82
C.   126
D.   no neutrons
E.   208
Question #6
How many protons and electrons are present in one Br1- ion?
A.   35 p, 35 e
B.   80 p, 34 e
C.   35 p, 34 e
D.   80 p, 81 e
E.   35 p, 36 e
Question #7
What percentage of the mass of a carbon-12 atom is contributed by its electrons? Given the mass of an electron is (1/1836) amu.
A.   99.97%
B.   6.0%
C.   0.027%
D.   50.0%
E.   33.0%
Question #8
Which of these elements is chemically similar to magnesium?
A.   sulfur
B.   calcium
C.   nickel
D.   iron
E.   potassium
Question #9
Which of these elements is chemically similar to potassium?
A.   calcium
B.   arsenic
C.   phosphorus
D.   cesium, Cs
E.   cerium, Ce
Question #10
Which pair of elements would be most likely to form an ionic compound?
A.   Zn and K
B.   Al and Rb
C.   F and Al
D.   P and Br
E.   C and S

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