Chemistry 212-213
Reveiw
Atomic Structure
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The atomic number indicates __________.
A) the number of neutrons in a nucleus
B) the total number of neutrons and protons in a nucleus
C) the number of protons or electrons in a neutral atom
D) the number of different isotopes of an element
E) the number of atoms in 1 g of an element
1)
2) The formula of a salt is XCl2. The X-ion in this salt has 28 electrons. The metal X is __________.
2)
3) The gold foil experiment performed in Rutherford's lab __________.
A) was the basis for Thomson's model of the atom
B) confirmed the plum-pudding model of the atom
C) proved the law of multiple proportions
D) led to the discovery of the atomic nucleus
E) utilized the deflection of beta particles by gold foil
3)
A) Fe
B) Pd
C) Ni
D) V
E) Zn
4) Which species has 16 protons?
A) 31P
B) 16O
C) 36Cl
D) 34S2-
E) 80Br-
5) Which species has 18 electrons?
A) 32S-2
B) 35Cl
C) 39K
D) 64Cu+2
E) 27Al+3
4)
5)
6) Radium undergoes alpha decay. The product of this reaction also undergoes alpha decay. What is
the product of this second decay reaction?
A) Hg
B) Rn
C) U
D) Po
E) Th
6)
7) What happens to the mass number and the atomic number of an element when it undergoes beta
decay?
A) The mass number does not change and the atomic number decreases by 2.
B) Neither the mass number nor the atomic number change.
C) The mass number does not change and the atomic number increases by 1.
D) The mass number decreases by 4 and the atomic number decreases by 2.
E) The mass number increases by 2 and the atomic number increases by 1.
7)
8) The energy of a photon of light is __________ proportional to its frequency and __________
proportional to its wavelength.
A) indirectly, not
B) directly, directly
C) inversely, directly
D) inversely, inversely
E) directly, inversely
8)
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9) What is the frequency (s-1 ) of a photon that has an energy of 4.38 × 10-18 J?
A) 6.61 × 1015
9)
B) 1.45 × 10-16
C) 2.30 × 107
D) 1.31 × 10-9
E) 436
10) Of the following transitions in the Bohr hydrogen atom, the __________ transition results in the
emission of the highest-energy photon.
A) n = 1 n = 6
B) n = 1 n = 4
C) n = 6 n = 1
D) n = 3 n = 6
E) n = 6 n = 3
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10)