Atomic Structure Worksheet Page 5
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16(2) 2; (3) 3; (4) 4.
___ 72. Which represents the electron configuration of an isotope of oxygen in the ground
2
2
1
2
2
2
2
2
3
2
2
4
state? (1) 1s
,2s
,2p
; (2) 1s
,2s
,2p
; (3) 1s
,2s
,2p
; (4) 1s
,2s
,2p
.
___ 73. Which sample contains the same number of atoms as 24 grams of carbon? (1) 80.
G. Ar; (2) 24 G. Mg; (3) 10. G. Ne; (4) 4.0 G. He.
___ 74. Which element requires the least amount of energy to remove its most loosely bound
electron? (1) Li; (2) Mg; (3) Ba; (4) Ca.
___ 75. The maximum number of electrons possible in any principal energy level (principal
2
2
quantum number = n) is equal to (1) n; (2) 2n; (3) n
; (4) 2n
.
___ 76. What is the number of sublevels in the fourth principal energy level? (1) 1; (2) 2;
(3) 3; (4) 4.
___ 77. How many neutrons are in the nucleus of an atom that has an atomic number of 17
and a mass number of 35? (1) 17; (2) 18; (3) 35; (4) 52.
___ 78. Which atom has the largest radius? (1) Li; (2) Be; (3) C; (4) F.
___ 79. Isotopes are atoms which have different (1) atomic masses; (2) atomic numbers;
(3) atomic radii; (4) electron configurations.
___ 80. When the aluminum atom is in the ground state then how many orbitals contain
only one electron? (1) 1; (2) 2; (3) 3; (4) 13.
___ 81. Van der Waals forces will increase when there is a decrease in the (1) number of
molecules; (2) size of molecules; (3) distance between molecules; (4) mass of
molecules.
___ 82. What is the total charge on an ion that contains 10 electrons, 13 protons, and 15
neutrons? (1) -1; (2) +1; (3) -3; (4) +3.
___ 83. The element whose properties are most similar to those of tellurium is
(1) Be;
(2) S; (3) O; (4) Po.
___ 84. Which atom has the greatest affinity for an electron?
(1) Li; (2) Br; (3) Na;
(4) Cl.
___ 85. Which energy level fills after the 4s energy level is filled? (1) 4p; (2) 4d; (3) 3d;
(4) 5s.
___ 86. The total number of completely filled orbitals in an atom of nitrogen in the ground
state is (1) 1; (2) 2; (3) 3; (4) 5.
___ 87. The nucleus of an atom consists of 8 protons and 6 neutrons. The total number of
electrons present in a neutral atom of this element is (1) 6; (2) 2; (3) 8; (4) 14.
___ 88. If the electronegativity difference between the elements in compound NaX is 3.1
then the atom represented by X is (1) F; (2) Cl; (3) Br; (4) I.
___ 89. Potassium forms an ion with a charge of
(1) +1 by losing one electron; (2) -1 by
Atomic Structure Questions
page 5 of 8
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