The Periodic Table Practice Test
____ 1 The electron configuration of cesium, atomic number 55, is [Xe] 6s1. In what period is cesium?
a) Period 55 c) Period 8
b) Period 1 d) Period 6
____ 2 Ionization refers to the process of
a) losing or gaining electrons. c) changing from one period to another.
b) losing or gaining protons. d) turning lithium into fluorine.
____ 3 The electrons available to be lost, gained, or shared when atoms form compounds are called
a) ions. c) valence electrons.
b) electron clouds. d) d electrons.
____ 4 The electron configuration of aluminum, atomic number 13, is [Ne] 3s2 3p1. Aluminum is in Period
a) 13. c) 6.
b) 2. d) 3.
____ 5 A positive ion is known as a(n)
a) valence electron. c) cation.
b) anion d) ionic radius.
____ 6 A negative ion is known as a(n)
a) cation. c) ionic radius.
b) anion. d) valence electron.
____ 7 Period 4 contains 18 elements. How many of these elements have electrons in the d sublevel?
a) 8 c) 16
b) 18 d) 10
____ 8 What are the radioactive elements with atomic numbers from 90 to 103 called?
a) the actinides c) the lanthanides
b) the noble gases d) the rare-earth elements
____ 9 Calcium, atomic number 20, has the electron configuration [Ar] 4s2. In what period is calcium?
a) Period 20 c) Period 4
b) Period 8 d) Period 2
____ 10 The periodic law states that
a) electrons exhibit properties of both particles and waves.
b) no two electrons with the same spin can be found in the same place in an atom.
c) the physical and chemical properties of the elements are functions of their atomic numbers.
d) the chemical properties of elements can be grouped according to periodicity but physical properties cannot.
____ 11 The horizontal rows on the periodic table are called
a) elements. c) actinides.
b) periods. d) families.
____ 12 Which general trend is demonstrated by the Group 17 elements from top to bottom on the Periodic Table?
a) an increase in first ionization energy c) an increase in nonmetallic behavior
b) a decrease in atomic radius d) a decrease in electronegativity ____ 13 Elements in a group or column in the periodic table can be expected to have similar
a) numbers of neutrons. c) atomic numbers.
b) properties. d) atomic masses.
____ 14 For groups 13 through 18, the total number of electrons in the highest occupied level equals the group number
a) minus 1. c) plus 5.
b) minus 10. d) plus 1.
____ 15 The element that has the greatest electronegativity is
a) oxygen. c) chlorine.
b) sodium. d) fluorine.
____ 16 One-half the distance between the nuclei of identical atoms that are bonded together is called the
a) atomic volume. c) electron cloud.
b) atomic radius. d) atomic diameter.
____ 17 In the elements shown in the figure below, the s sublevel of the highest occupied energy level
a) varies in the number of electrons it contains.
b) always contains one electron.
c) is always empty.
d) always contains two electrons.
____ 18 On the modern Periodic Table, the elements are arranged in order of increasing
a) oxidation number c) atomic number
b) atomic mass d) mass number
____ 19 Group 18 noble gases are inert because
a) they can have either a positive or a negative charge.
b) their outermost energy level is missing one electron.
c) their outermost energy level is full.
d) they readily form positive ions.
____ 20 Which ion has the correct charge?
a) O 2- c) Pb 2+
b) I 1+ d) Mg 1-
____ 21 Elements in which the d-sublevel is being filled have the properties of
a) metalloids. c) metals.
b) gases. d) nonmetals.
____ 22 Argon, krypton, and xenon are
a) noble gases. c) alkaline earth metals.
b) lanthanides. d) actinides.
____ 23 Identify the sublevels in a period that contains 32 elements.
a) s, p, d c) s, p, d, f
b) s, p d) s, f
____ 24 All known chemical elements are organized into groups based on similar chemical properties in the
a) element table. c) periodic chart.
b) chemical chart. d) None of the above
____ 25 The periodic law states that the physical and chemical properties of elements are periodic functions of their atomic
a) charges. c) numbers.
b) masses. d) radii.
____ 26 To which block do the actinide elements belong?
a) p block c) d block
b) s block d) f block
____ 27 Nitrogen's electron configuration is 1s2 2s2 2p3. To what group does nitrogen belong?
a) Group 2 c) Group 7
b) Group 15 d) Group 17
____ 28 The electron configuration of an element is [Kr] 4d6 5s1. To what group does this element belong?
a) Group 9 c) Group 7
b) Group 4 d) Group 5
____ 29 Which is the best reason that the atomic radius generally increases with atomic number in each group of elements?
a) The number of neutrons increases.
b) The nuclear charge increases.
c) The number of occupied energy levels increases.
d) A new octet forms.
____ 30 The order of elements in the periodic table is based on
a) the number of neutrons in the nucleus. c) atomic mass.
b) the electric charge of the nucleus. d) the number of protons in the nucleus.
____ 31 The atomic number of lithium, the first element in Group 1, is 3. The atomic number of the second element in this group is
a) 18. c) 4.
b) 11. d) 10.
____ 32 What is removed when the ionization energy is supplied to an atom of an element?
a) the nucleus c) an ion
b) an electron d) the electron cloud
____ 33 The number of valence electrons in Group 17 elements is a) equal to the period number. c) 17.
b) 8. d) 7.
____ 34 Atoms of elements that are in the same group have the same number of
a) neutrons. c) protons.
b) protons and neutrons. d) valence electrons.
____ 35 A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called
a) electron affinity. c) electronegativity.
b) ionization potential. d) electron configuration.
____ 36 The vertical columns on the periodic table are called
a) elements. c) rows.
b) periods. d) groups.
____ 37 Which block in the periodic table contains the alkali metals?
a) d c) s
b) p d) f
____ 38 A nonmetal is usually
a) brittle. c) a good conductor.
b) malleable. d) used to make jewelry.
____ 39 Noble gases are in Group 18, and are best known because they are
a) lanthanides. c) unreactive.
b) excellent conductors. d) rare.
____ 40 When determining the size of an atom by measuring the distance between bonded, identical, adjacent nuclei, the radius of an atom is
a) one-fourth the distance between nuclei.
b) equal to the distance between nuclei.
c) twice the distance between nuclei.
d) one-half the distance between nuclei.
____ 41 Metalloids are often
a) semiconductors. c) lanthanides.
b) from outer space. d) unreactive.
____ 42 Magnesium, atomic number 12, has the electron configuration [Ne] 3s2. To what group does magnesium belong?
a) Group 2 c) Group 5
b) Group 12 d) Group 3
____ 43 Mendeleev predicted that the spaces in his periodic table represented
a) isotopes. c) undiscovered elements.
b) radioactive elements. d) unstable elements.
____ 44 Bromine, atomic number 35, belongs to Group 17. How many electrons does bromine have in its outermost energy level?
a) 18 c) 17
b) 35 d) 7
____ 45 An atom of an element has a total of 12 electrons. An ion of the same element has a total of 10 electrons.
Which statement describes the charge and radius of the ion?
a) The ion is negatively charged and its radius is larger than the radius of the atom.
c) The ion is positively charged and its radius is larger than the radius of the atom.
b) The ion is positively charged and its d) The ion is negatively charged and its
radius is smaller than the radius of the atom.
radius is smaller than the radius of the atom.
____ 46 The elements whose electron configurations end with s2 p5 in the highest occupied energy level belong to Group
a) 17. c) 7.
b) 3. d) 10.
____ 47 The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to
a) Moseley. c) Ramsay.
b) Mendeleev. d) Bohr.
____ 48 The period of an element can be determined from its
a) reactivity. c) symbol.
b) electron configuration. d) density.
____ 49 Elements to the right side of the periodic table (p-block elements) have properties most associated with
a) gases. c) metalloids.
b) nonmetals. d) metals.
____ 50 An element that has an electron configuration of [Ne]3s23p3 is in Group _____ of the periodic table.
a) 3 c) 15
b) 6 d) 2
____ 51 The most characteristic property of the noble gases is that they a) have low boiling points.
b) are radioactive.
c) are largely unreactive.
d) are gases at ordinary temperatures.
____ 52 It is easy to determine whether a substance is a metal if the substance is a) very brittle.
b) very hard.
c) a good electrical and heat conductor.
d) easy to break down into its components.
____ 53 An atom of an element forms a 2 ion. In which group on the Periodic Table could this element be located?
a) 13 c) 2
b) 1 d) 17
____ 54 Horizontal rows of the periodic table are called ____.
a) clusters c) families
b) groups d) periods
____ 55 The group of soft, silvery, reactive metals, all of which have one electron in an s orbital, is known as the a) alkaline-earth metals. c) metalloids.
b) alkali metals. d) transition metals.
____ 56 Across a period in the periodic table, atomic radii a) gradually increase, then sharply decrease.
b) gradually decrease.
c) gradually decrease, then sharply increase.
d) gradually increase.
____ 57 What ion does Cl make?
a) Cl 1- c) Cl 1+
b) Cl 2- d) Ne
____ 58 The principle that states that the physical and chemical properties of the elements are periodic functions of their atomic numbers is
a) the periodic table. c) the periodic law.
b) the law of properties. d) Mendeleev's law.
____ 59 How many elements are in a period in which only the s and p sublevels are filled?
a) 8 c) 32
b) 2 d) 18
____ 60 What ion does Mg make?
a) Mg 2- c) Mg 2+
b) Mg 1- d) Mg 1+
____ 61 Which of the following elements is an alkali metal?
a) magnesium c) calcium
b) sodium d) mercury
____ 62 Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing
a) reactivity. c) atomic mass.
b) atomic number. d) density.
____ 63 In the alkaline-earth group, atoms with the smallest radii a) are all gases.
b) have the highest ionization energies.
c) have the largest volume.
d) are the most reactive.
____ 64 The most reactive group of the nonmetals is the
a) halogens. c) lanthanides.
b) noble gases. d) transition elements.
____ 65 To which group do fluorine and chlorine belong?
a) halogens c) alkaline-earth metals
b) transition elements d) actinides
____ 66 An atom of aluminum in the ground state and an atom of gallium in the ground state have the same a) total number of valence electrons c) total number of protons
b) mass d) electronegativity
____ 67 The energy required to remove an electron from an atom is the atom's a) ionization energy. c) electron affinity.
b) electronegativity. d) electron energy.
____ 68 Strontium's highest occupied energy level is 5s2. To what group does strontium belong?
a) Group 5 c) Group 2
b) Group 6 d) Group 8
____ 69 The number of valence electrons in Group 1 elements is
a) 2. c) 1.
b) equal to the period number. d) 8.
____ 70 A metal is called malleable if it
a) can be squeezed out into a wire. c) can be hammered into sheets.
b) exists naturally as an element. d) has a shiny appearance.
____ 71 Neutral atoms with an s2p6 electron configuration in the highest energy level belong to which block of the periodic table?
a) p block c) f block
b) d block d) s block
____ 72 A horizontal row of blocks in the periodic table is called a(n)
a) group. c) period.
b) octet. d) family.
____ 73 Hydrogen is placed separately from other elements in the periodic table because it a) does not exist as a free element in nature.
b) is a gas.
c) has many unique properties.
d) has atomic number one.
____ 74 Compared to the alkali metals, the alkaline-earth metals a) combine more readily with nonmetals.
b) are less reactive.
c) are less dense.
d) have lower melting points.
____ 75 A sample of an element is malleable, shiny and can conduct electricity. This element could be
a) S c) H
b) Zn d) He
The Periodic Table Practice Test Answer Section
MULTIPLE CHOICE
1 D 2 A 3 C 4 D 5 C 6 B 7 C 8 A 9 C 10 C 11 B 12 D 13 B 14 B 15 D 16 B 17 A 18 C 19 C 20 A 21 C 22 A 23 C 24 C 25 C 26 D 27 B 28 C 29 C 30 D 31 B 32 B 33 D 34 D 35 C 36 D 37 C 38 A 39 C 40 D 41 A
42 A 43 C 44 D 45 B 46 A 47 B 48 B 49 B 50 C 51 C 52 C 53 C 54 D 55 B 56 B 57 A 58 C 59 A 60 C 61 B 62 C 63 B 64 A 65 A 66 A 67 A 68 C 69 C 70 C 71 C 72 C 73 C 74 B 75 B
