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Multiple Choice (78﹪)
1. A substance have a definite shape and a definite volume. The substance is a (a) gas
(b) solid (c) liquid (d) aqueous solution
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2. A substance has a distinct melting point and density. It cannot be decomposed into
chemically simpler substance. The substance is a (a) element (b) compound
(c) solution (d) heterogeneous mixture
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3. A sample of a given liquid has uniform properties, but the temperature at which the
liquid boil slowly changes as it boils away. The liquid sample is a (a) heterogeneous
mixture (b) compound (c) homogeneous mixture (d) element
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4. Which of the following is a chemical property of aluminum(a) It melts at 660℃.
(b)It has a density of 2.7 g/ml (c) When burns in oxygen to form aluminum oxide (d)
It is shiny metal. . □
5. Water stored behind a dam has( ) energy. The water flowing over the spillway has
( ) energy. (a) chemical, electrical (b) heat, mechanical (c) light, electrical
(d)potential,kinetic
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6. Which of the following has the lowest density？(a) a truckload of feathers (b)
a cup of water (c) an ounce of gold (d) a gallon of gasoline
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7. Which of the following is the symbol for silver？(a)Se (b)S (c)Si (d)Ag □
8. Ozone is the name of (a)one element (b)a compound (c)a mixture (d) a solution □
9. Which of the following charge of 0 and a mass 1amu？(a)a neutron (b)a proton
(c)a electron (d)a helium nucleus □
10.Isotopes have (a) different mass numbers but the same atomic number (b) the same
mass number but different atomic numbers (c) different mass numbers and atomic
numbers (d) the same mass number and atomic number □
11.Which of the following describes an isotopes with a mass number of 227 that
229
141
229
contains 141 neutrons in its nucleus(a) 229
141 Ra (b) 88 Ra (c) 141 Ac (d) 88 Ac □
12.Which of the following isotope is used as standard for atomic mass？
(a) 1 H (b) 16O (c) 13C (d) 12C □
13.Which of the following is a pentatomic molecule of a compound？
(a)SO 3 (b) NH4Cl (c) H NO 3 (d) CO2 □
14.Which of the following is a basic particle of an element？
(a)compound (b) molecule (c) a cation (d)an anion □
15. Which of the following is a polyatomic anion (a) P3－(b)K＋(c) SO4 2－(d) NH4＋ □
16.Which would be the electrical charge on a calcium atom containing 18 electrons
(a)2－ (b)1－ (c)1＋ (d)2＋ □
17.Which would be the formula of an ionic compound made up ofaAl 3＋ions and O2－
(a) AlO2 (b) Al3O2 (c) Al2O3 (d) Al2O □
18.Which of the following element is chalcogen (a) Ra (b)Ac (c)Te (d) Kr □
19.Which of the following element is metalloid (a)Si (b)Sn (c)Se (d)Sr
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20.Which of the following element is transition metal (a)copper (b)radon
(c) magnesium (d)chlorine □
21.Which of the following metal is forms more than one charge (a)Fe (b)Ba (c)Al
(d)P □
22.Which of the following is the correct name for PbO (a) lead dioxide (b) lead oxide
(c) lead(IV)oxide (d) lead (II)oxide
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23.The formula of lithium sulfide is (a)LiS (b) Li3 S2 (c) LiS2 (d) Li2 S
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24.Which of the following is the correct formula for an element (a) N 4 (b) S2 (c) C2
(d) F2 □
25.Which of the following is the formula for magnesium nitride (a) Mg3N2 (b) MgN2
2
(c)MgN (d) Mg2N3 □
26.Sodium superoxide has the formula Na2.O2. What is the charge on the superoxide
ion (a)－1 (b)－2 (c)＋2 (d)＋1
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27.Which of the following types of orbitals are present in the forth(n＝4) shell (a) s,p
(b) p,d,f (c) s,p,d (d) s,p,d,f □
28,How many orbitals are in a f subshell (a)5 (b)3 (c)10 (d)7
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29.What is the electron capacity of the 5d subshell (a)6 (b)18 (c)14 (d)10 □
30.Which of the following elements has the electron configuration Kr 5s24d7
(a)Rh (b)Zr (c)Tc (d) Pd
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31. What is the electron configuration of Sb (atomic number 51) (a) Kr 5s24d105p3
(b)Kr 5s24d105p1 (c)Kr 5s24d65p1 (c)Kr 5s24d65p3 □
32.Silicon has two unpaired electrons. This is a result of (a) Hund，s rule
(b) Bohr，s model (c)the Pauli exclusion principle (d) The Aufbau principle
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33.Which of the following groups of elements have the general electron configuration
ns2np6 (a)halogen (b)transition element (c)alkaline (d)noble gas
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34. Which of the following atoms has the largest radius (a)As (b)Se (c)Sb (d)Te □
35. Which of the following atoms has the lowest first ionization energy(a)N (b)O
(c)P (d)S
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＋
＋
36.Which of the following ions requires the most energy to form (a) Na (b)Mg3
＋
－
(c) Al3 (d)O2
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37.Which of the following pairs of elements would be expected to form an ionic bond
(a)Mg,Na (b)Mg,I (c)N,O (d)B,F □
38.Which of the following is correct formula for the compound formed between
beryllium and sulfide (a) BeS (b) BeS2 (c) Be2S (d)Be3S2
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39.One formula unit of Al2(SO3)3 contains (a) )three aluminum atoms (b)three oxygen
atoms(c) six aluminum atoms (d) six sulfur atoms
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Problems (30﹪)
1. Which group in the periodic table has the following general electron configuration
(a)ns2(n－1)d8 (b) ns2np3 (c)ns2(n－1)d3
2. Write the general electron configurations for the following group
(a)VI B (b) VI A (c) III B
3. Write the total electron configuration for each of the following elements
(a)47Ag (b) 33As (c) 20Ca
4. Using the noble gas shorthand , write the electron configuration for the following
elements (a)82Pb (b) 51Sb (c) 37Rb
5. Which elements have the following electron configurations
(a) Kr 5s14d5 (b)Xe 6s25d104f146p5 (c)Rn 7s26d3