WorksheetsUnit 3 - Periodic Table: Review
Total questions: 60
Worksheet time: 31mins
The elements on the Periodic Table of the Elements are arranged in order of increasing
atomic mass
atomic number
mass number
oxidation state
What is the number of valence electrons in a nitrogen atom in the ground state?
5
2
7
14
Which element has chemical properties that are most similar to potassium?
calcium
cesium
nitrogen
sulfur
Strontium and barium have similar chemical properties because atoms of these elements have the same number of
protons
neutrons
electron shells
valence electrons
Magnesium and calcium have similar chemical properties because their atoms in the ground state have
equal numbers of protons and electrons
equal numbers of protons and neutrons
two electrons in the first shell
two electrons in the outermost shell
In the ground state, an atom of which element has seven valence electrons?
sodium
phosphorus
nitrogen
fluorine
The elements on the Periodic Table of the Elements are arranged in order of increasing
atomic number
mass number
number of neutrons
number of valence electrons
In the ground state, the valence electrons of a krypton atom are found in
the first shell
the outermost shell
both the nucleus and the first shell
both the first shell and the outermost shell
The elements on the Periodic Table of the Elements are arranged in order of increasing
atomic mass
formula mass
atomic number
oxidation number
Which electrons in a calcium atom in the ground state have the greatest effect on the chemical properties of calcium?
the two electrons in the first shell
the two electrons in the fourth shell
the eight electrons in the second shell
the eight electrons in the third shell
In the ground state, all atoms of Group 15 elements have the same number of
valence electrons
electron shells
neutrons
protons
On the Periodic Table, the number of protons in an atom of an element is indicated by its
atomic mass
atomic number
selected oxidation states
number of valence electrons
What is the number of electrons in an atom of scandium?
21
24
45
66
Which element has atoms in the ground state with the greatest number of valence electrons?
tin
sulfur
arsenic
fluorine
The arrangement of the elements from left to right in Period 4 on the Periodic Table is based on
atomic mass
atomic number
the number of electron shells
the number of oxidation states
Which two elements have the most similar chemical properties?
beryllium and magnesium
hydrogen and helium
phosphorus and sulfur
potassium and strontium
The valence electrons in an atom of phosphorus in the ground state are all found in
the first shell
the second shell
the third shell
the fourth shell
Which element has six valence electrons in each of its atoms in the ground state?
Se
As
Kr
Ga
The elements in Period 4 on the Periodic Table are arranged in order of increasing
atomic radius
atomic number
number of valence electrons
number of occupied shells of electrons
The elements on the Periodic Table are arranged in order of increasing
mass number
atomic number
number of isotopes
number of valence electrons
The number of valence electrons in each atom of an element affects the element’s
chemical properties
number of isotopes
decay mode
half-life
Rubidium and cesium have similar chemical properties because, in the ground state, the atoms of both elements each have
one electron in the outermost shell
two electrons in the outermost shell
one neutron in the nucleus
two neutrons in the nucleus
In the ground state, an atom of which element has two valence electrons?
Cr
Cu
Ni
Se
Which electron shell contains the valence electrons of a radium atom in the ground state?
the sixth shell
the second shell
the seventh shell
the eighteenth shell
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
The valence electron of which atom in the ground state has the greatest amount of energy?
cesium
lithium
rubidium
sodium
The elements in Group 2 have similar chemical properties because each atom of these elements has the same
atomic number
mass number
number of electron shells
number of valence electrons
Which elements have the most similar chemical properties?
Si, As, and Te
N2, O2, and F2
Mg, Sr, and Ba
Ca, Cs, and Cu
Which element has chemical properties that are most similar to the chemical properties of fluorine?
boron
chlorine
neon
oxygen
What is the total number of valence electrons in a germanium atom in the ground state?
22
2
32
4
Which list includes elements with the most similar chemical properties?
Br, Ga, Hg
Cr, Pb, Xe
O, S, Se
N, O, F
Which element has chemical properties that are most similar to the chemical properties of sodium?
beryllium
calcium
lithium
magnesium
What is the total number of valence electrons in a calcium atom in the ground state?
8
2
18
20
The chemical properties of calcium are most similar to the chemical properties of
Ar
K
Mg
Sc
An atom of aluminum in the ground state and an atom of gallium in the ground state have the same:
mass
electronegativity
total number of protons
total number of valence electrons
Magnesium and calcium have similar chemical properties because a magnesium atom and a calcium atom have the same:
atomic number
mass number
total number of electron shells
total number of valence electrons
What is the total number of valence electrons in an atom of germanium in the ground state?
8
2
14
4
Which two elements have the most similar chemical properties?
Be and Mg
Ca and Br
Cl and Ar
Na and P
What is the total number of protons in an atom with the electron configuration 2-8-18-32-18-1?
69
79
118
197
Magnesium and calcium have similar chemical properties because an atom of each element has the same total number of
electron shells
valence electrons
neutrons
protons
Which element is a nonmetal and solid at STP?
lead
nitrogen
sodium
sulfur
Which sample at STP has the same chemical properties as 10. grams of Al(s) at STP?
10. grams of Si(s)
10. grams of Na(s)
5 grams of Al(s)
5 grams of Mg(s)
Atoms of which element in Group 15 have the greatest electronegativity?
As
Bi
N
P
Which element requires the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state?
Na
Ar
P
Cl
Which element has chemical properties that are most similar to potassium?
calcium
cesium
nitrogen
sulfur
The element in Group 14, Period 3, of the Periodic Table is classified as a
metal
noble gas
metalloid
nonmetal
As the elements in Period 2 are considered in order from lithium to fluorine, there is an increase in the
atomic radius
electronegativity
number of electron shells
number of electrons in the first shell
As the elements in Period 2 of the Periodic Table are considered in order from left to right, which property generally decreases?
atomic radius
electronegativity
ionization energy
nuclear charge
As the first five elements in Group 14 are considered in order from top to bottom, there are changes in both the
number of valence shell electrons and number of first shell electrons
electronegativity values and number of first shell electrons
number of valence shell electrons and atomic radii
electronegativity values and atomic radii
Which element is malleable at STP?
chlorine
copper
helium
sulfur
Which element is classified as a metalloid?
Te
S
Hg
I
Based on Table S, which group on the Periodic Table has the element with the highest electronegativity?
Group 1
Group 2
Group 17
Group 18
Which element is classified as a metalloid?
Cr
Cs
Sc
Si
Which trend is observed as the first four elements in Group 17 on the Periodic Table are considered in order of increasing atomic number?
Electronegativity increases.
First ionization energy decreases.
The number of valence electrons increases.
The number of electron shells decreases.
In which group on the Periodic Table would a nonmetallic element belong if atoms of this element tend to gain two electrons to complete their valence shell?
14
15
16
17
Which element tends not to react with other elements?
helium
hydrogen
phosphorus
potassium
Which list represents the classification of the elements nitrogen, neon, magnesium, and silicon, respectively?
metal, metalloid, nonmetal, noble gas
nonmetal, noble gas, metal, metalloid
nonmetal, metalloid, noble gas, metal
noble gas, metal, metalloid, nonmetal
Which properties are characteristic of Group 2 elements at STP?
good electrical conductivity and electronegativities less than 1.7
good electrical conductivity and electronegativities greater than 1.7
poor electrical conductivity and electronegativities less than 1.7
poor electrical conductivity and electronegativities greater than 1.7
Which general trends in atomic radius and electronegativity are observed as the elements in Period 3 are considered in order of increasing atomic number?
Atomic radius decreases and electronegativity increases.
Atomic radius increases and electronegativity decreases.
Both atomic radius and electronegativity increase.
Both atomic radius and electronegativity decrease.
At STP, which element is malleable and a good conductor of electricity?
xenon
silicon
platinum
hydrogen
