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WorksheetsPS - Unit B - Activities #15-17
Total questions: 116
Worksheet time: 58mins
Name
Class
Date
1.
The energy of an electron varies depending upon which energy level that electron occupies.
a)
True
b)
False
2.
Atoms of different elements have different numbers of protons.
a)
True
b)
False
3.
In an atom, an electron that is close to the nucleus is in the outermost energy level.
a)
True
b)
False
4.
To become more chemically stable, an atom that has two electron in its outer energy level will gain two electrons.
a)
True
b)
False
5.
It is easier to remove an electron from the outer energy level than from one closer to the nucleus.
a)
True
b)
False
6.
The N2 molecule is nonpolar.
a)
True
b)
False
7.
Nonpolar molecules have a slight negative charge on one end and a slight positive charge on the other.
a)
True
b)
False
8.
The atomic number of an element equals the number of neutrons in an atom of that element.
a)
True
b)
False
9.
The exact position of electrons of an atom cannot be determined.
a)
True
b)
False
10.
A chemical formula shows only the number of atoms in a sample of a compound.
a)
True
b)
False
11.
The electrons closest to the nucleus of an atom have the least amount of energy.
a)
True
b)
False
12.
The number of valence electrons in an atom tells you how many chemical bonds that atom can form.
a)
True
b)
False
13.
A compound can have different chemical and physical properties than those of the elements it is made from.
a)
True
b)
False
14.
A molecule is a group of atoms held together by covalent bonding that acts as an independent unit.
a)
True
b)
False
15.
A polar molecule is one that has equal electron distribution between atoms.
a)
True
b)
False
16.
An ionic bond forms when a nonmetal atom transfers one or more valence electrons to a metal atom.
a)
True
b)
False
17.
Covalent bonds are stronger than ionic bonds.
a)
True
b)
False
18.
An atom with seven valence electrons would most likely lose an electron to become stable.
a)
True
b)
False
19.
Elements on the far right of the periodic table are classified as nonmetals.
a)
True
b)
False
20.
The closer an electron is to the nucleus, the lower its energy.
a)
True
b)
False
21.
For an atom to be neutral, the number of protons must equal the number of neutrons.
a)
True
b)
False
22.
The properties of a compound are the same as the properties of the elements making up the compound.
a)
True
b)
False
23.
Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule.
a)
True
b)
False
24.
Particles formed from the covalent bonding of atoms are called ions.
a)
True
b)
False
25.
Molecules are neutral.
a)
True
b)
False
26.
When an atom gains or loses electrons, the charged particle that results is called a molecule.
a)
True
b)
False
27.
Most atoms are chemically unstable when its outer energy level 8 valence electrons.
a)
True
b)
False
28.
The chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atoms do. The hydrogen chloride molecule is therefore a nonpolar molecule.
a)
True
b)
False
29.
Which of the following is a compound?
a)
gold
b)
neon
c)
oxygen
d)
water
30.
One property of an ionic bond is...
a)
...the formation of a shiny surface.
b)
...low melting points.
c)
...the formation of solid crystals.
d)
...not dissolving in water.
31.
Which type of bond is salt?
a)
ionic
b)
metallic
c)
covalent
d)
valence
32.
Why is water a covalent bond?
a)
Water forms solid crystals over a given amount of time.
b)
The electrons from the hydrogen and oxygen in water are shared in a pool.
c)
Water is two nonmetal atoms which share electrons, forming a molecule.
d)
Hydrogen and oxygen gain and lose electrons when forming the molecule water.
33.
An ion is an atom that has gained or lost ___.
a)
electrons
b)
neutrons
c)
protons
d)
metals
34.
Atoms that gain electrons become ions with a ___ charge.
a)
equal
b)
positive
c)
negative
d)
like
35.
Which type of covalent bond is the molecule H2?
a)
single covalent bond
b)
triple covalent bond
c)
double covalent bond
d)
quadruple covalent bond
36.
Sodium is an atom represented as Na+. What does the + mean?
a)
The plus sign means it can combine with almost every element found on the periodic table.
b)
Sodium has a tendency to lose a valence electron when it becomes an ion.
c)
Sodium has a tendency to gain a valence electron when it becomes an ion.
d)
One positive sign is listed because it only takes one electron to make the atom neutral.
37.
Elements on the far right of the periodic table in Group 18 are referred to as ___ and are chemically stable.
a)
metals
b)
metalloids
c)
nonmetals
d)
noble gases
38.
Aluminum oxide is a chemical formula with two aluminum atoms and three oxygen atoms. Which is the correct formula?
a)
Al2O3
b)
2AlO3
c)
(Al2)O3
d)
Al3O2
39.
In general, nonmetals are...
a)
...good conductors of electricity.
b)
...good conductors of heat.
c)
...malleable and ductile.
d)
...gases at room temperature.
40.
In general, metals are...
a)
...poor conductors of heat.
b)
...poor conductors of electricity.
c)
...brittle.
d)
...good conductors of heat.
41.
The millions of compounds that exits are made from approximately ___ elements.
a)
50
b)
115
c)
75
d)
150
42.
Most of the mass of an atom is found in its ___.
a)
nucleus
b)
atomic number
c)
electron cloud
d)
mass number
43.
The particles that make up an atom are...
a)
...electrons, protons, and nuclei.
b)
...protons, neutrons, and nuclei.
c)
...elements, protons, and electrons.
d)
...protons, neutrons, and electrons.
44.
In an atom, electrons...
a)
...are located in the nucleus.
b)
...orbit around the outside of the nucleus.
c)
...are paired with neutrons.
d)
...are always in the same place in an atom.
45.
Electron dot diagrams are used to represent...
a)
...protons.
b)
...atomic mass.
c)
...valence electrons.
d)
...the structure of the nucleus.
46.
The energy levels of an atom are occupied by ___.
a)
electrons
b)
neutrons
c)
protons
d)
ions
47.
The maximum number of electrons in the second energy level of an atom is ___.
a)
two
b)
eight
c)
four
d)
ten
48.
In the compound H2O, the electrons in the bonds are unequally shared between the oxygen and hydrogen, forming ___.
a)
cations
b)
nonpolar molecules
c)
ionic bonds
d)
polar bonds
49.
In carbon dioxide, each oxygen atom shares four electrons with the carbon atom. What is this type of bond called?
a)
triple covalent
b)
polar covalent
c)
double covalent
d)
ionic
50.
What is the group number for elements that have a stable number of electrons in their outer energy level?
a)
18
b)
2
c)
17
d)
1
51.
Which of the following compounds is not likely to have ionic bonds?
a)
LiF
b)
CH4
c)
NaCl
d)
MgF2
52.
Aspartame is an artificial sweetener; its formula is C13H16N2O5. Which element in the formula has the greatest number of atoms?
a)
carbon
b)
nitrogen
c)
hydrogen
d)
oxygen
53.
How many dots are shown in the electron dot diagram for calcium, atomic number 20?
a)
1
b)
8
c)
2
d)
20
54.
What is the name given to the units that make up covalently bonded compounds?
a)
molecules
b)
electrons
c)
ions
d)
energy levels
55.
Which of the following elements will likely form a negative ion in its ionic compounds?
a)
Li
b)
Mg
c)
Al
d)
Cl
56.
In a chemical formula, the number of each type of atom in the compound is shown by numbers called ___.
a)
superscripts
b)
oxidation numbers
c)
chemical symbols
d)
subscripts
57.
A chemical bond that occurs when atoms share electrons is a(n) ___ bond.
a)
covalent
b)
magnetic
c)
ionic
d)
polyatomic
58.
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable (not including hydrogen and helium)?
a)
2
b)
6
c)
4
d)
8
59.
Why do the noble gases not form compounds readily?
a)
They have empty outer energy levels.
b)
They have no electrons.
c)
They have seven electrons in the outer energy levels.
d)
Their outer energy levels have 8 valence electrons.
60.
The number of bonds an atom can form is represented in an electron dot diagram by ___.
a)
pairs of dots
b)
unpaired dots
c)
total number of dots
61.
Which part of an atom participates in chemical bonding?
a)
proton
b)
neutron
c)
electron
62.
An electron dot diagram shows...
a)
...the number of valence electrons.
b)
...the strength of electron energy fields.
c)
...the spacing arrangement of electrons.
63.
Except for hydrogen and helium, atoms tend to gain, lose, or share valence electrons until they have ___ valence electrons.
a)
2
b)
4
c)
6
d)
8
64.
In the chemical formula H2O, how many atoms of oxygen are represented?
a)
1
b)
2
c)
3
d)
4
65.
Which compound is a polar molecule?
a)
H2
b)
H2O
c)
CO2
66.
A double covalent bond is created when...
a)
...two atoms share one pair of valence electrons.
b)
...two atoms share bonds with four other atoms.
c)
...two atoms share two pairs of valence electrons.
67.
Which activity makes an nonmetal atom more stable when it is forming an ionic bond?
a)
losing an electron
b)
gaining an electron
68.
Which type of bond joins nonmetal atoms to nonmetal atoms?
a)
ionic
b)
metallic
c)
covalent
69.
Which is a properto of covalent compounds?
a)
poor conductor
b)
high boiling point
c)
high melting point
70.
An atom with ___ valence electrons is the most stable.
a)
0
b)
4
c)
8
d)
16
71.
Which type of covalent bond is the strongest?
a)
triple covalent bond
b)
single covalent bond
c)
double covalent bond
d)
ionic bond
72.
An ionic bond is formed between...
a)
...a noble gas and a metal.
b)
...a metal and a nonmetal.
c)
...two of the same types of atoms.
73.
Which is a property of covalent compounds?
a)
poor conductor
b)
high melting point
c)
good conductor
d)
always solid at room temperature
74.
Which group of elements is the most stable?
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
75.
Ionic bonds are formed to create ___.
a)
energy
b)
more atoms
c)
stability
d)
valence electrons
76.
Which best describes a valence electron?
a)
an inner electron that participates in chemical bonding
b)
an outermost electron that participates in chemical bonding
c)
an inner electron that does not participate in chemical bonding
d)
an outermost electron taht does not participate in chemical bonding
77.
An ionic bond forms when...
a)
...a metal and a nonmetal atom share electrons.
b)
...a metal gains an electron and a nonmetal loses an electron.
c)
...a metal loses an electron and a nonmetal gains an electron.
d)
...a metal atom combines with a nonmetal atom to become one atom.
78.
All periods on the periodic table contain the same number of elements.
a)
True
b)
False
79.
Elements in a group on the periodic table are in the same state at room temperature.
a)
True
b)
False
80.
A metalloid is an element with the same properties as a metal.
a)
True
b)
False
81.
Group 14 on the periodic table contains metals, nonmetals, and metalloids.
a)
True
b)
False
82.
Elements were arranged in order of increasing atomic mass on Mendeleev's first periodic table.
a)
True
b)
False
83.
Mendeleev was unable to foresee future discoveries based on his table of elements.
a)
True
b)
False
84.
The alkali metals are very stable and do not react easily with other elements.
a)
True
b)
False
85.
A metal is often shiny but is a poor conductor of electricity.
a)
True
b)
False
86.
Halogens frequently occur in nature as free elements.
a)
True
b)
False
87.
The position of an element in the periodic table tells you nothing about the element except its size.
a)
True
b)
False
88.
Elements on the far right of the periodic table are classified as nonmetals.
a)
True
b)
False
89.
Approximately how many elements are metals?
a)
1/2
b)
1/3
c)
3/4
d)
all of the periodic table
90.
What is meant by periodic in Periodic Table?
a)
the table has repeated cycles
b)
the table is only good for so long
c)
the elements occur more than once
d)
the table can be changed as needed
91.
Which of the following is NOT one of the repeating patterns in Mendeleev’s periodic table?
a)
melting point
b)
atomic mass
c)
boiling point
d)
reactivity
92.
The place of an element in the modern periodic table is determined by its _____.
a)
atomic number
b)
density
c)
atomic mass
d)
chemical activity
93.
Which of the following is not on an element key?
a)
atomic number
atomic number
atomic number
b)
element number
c)
atomic mass
d)
density
94.
A single horizontal portion of the periodic table is called a ___.
a)
class
b)
method
c)
group
d)
period
95.
Which of the following categories of elements represents almost three-fourths of the periodic table?
a)
gases
b)
metals
c)
metalloids
d)
nonmetals
96.
Which elements have properties of both metals and nonmetals?
a)
gases
b)
metals
c)
metalloids
d)
nonmetals
97.
The elements in the second column from the left edge of the periodic table are the _____.
a)
alkali metals
b)
alkaline earth metals
c)
transition elements
d)
lanthanide and actinide series
98.
Which of the following does NOT describe an alkali metal such as lithium?
a)
hard to cut
b)
silvery appearance
c)
react quickly with oxygen
d)
low density
99.
Which of the following is not a property of all metals?
a)
conduct electricity
b)
does not conduct heat
c)
shiny
d)
malleable when solid
100.
All of the following elements conduct electricity. Which is not a metal?
a)
lead
b)
iron
c)
carbon
d)
vanadium
101.
All metals...
a)
...melt at high temperatures.
b)
...contain iron.
c)
...conduct heat and electricity.
d)
...react with air and water.
102.
At room temperature, most oft the metals are___.
a)
soft
b)
liquids
c)
malleable
d)
solid
103.
Which general statement does not apply to metals?
a)
Most metals are ductile.
b)
Most metals are malleable.
c)
Most metals are brittle.
d)
Most metals are good conductors of electric current.
104.
Among the alkali metals, the tendency to react with other substances...
a)
...does not vary greatly among the members of the group.
b)
...increases from top to bottom within the group.
c)
...varies in an unpredictable way within the goup.
d)
...decreases from top to bottom within the group.
105.
Which of the following properties is not common to alkaline earth metals?
a)
soft and silvery
b)
low density
c)
react more quickly than alkali metals
d)
doe not occur naturally
106.
Which statement about noble gases is correct?
a)
They form compounds with very bright colors.
b)
They are highly reactive with both metals and nonmetals.
c)
Thye rarely form compounds in nature.
d)
They exist as single atoms rather than as molecules
107.
Helium and most nonmetals are found in which area of the periodic talbe?
a)
left-most side
b)
right side
c)
middle column
d)
bottom rows
108.
A halogen is found in Group ___.
a)
14
b)
16
c)
15
d)
17
109.
A halogen is an element that can react with a metal and form ___.
a)
a salt
b)
a metal
c)
a liquid
d)
sulfur
110.
Halogens are only found in nature as ___.
a)
liquids
b)
compounds
c)
salts
d)
molecules
111.
Which elements are located between the metals and the nonmetals on the periodic table?
a)
halogens
b)
noble gases
c)
metalloids
d)
synthetics
112.
A metalloid acts as a conductor of ___.
a)
high temperatures
b)
low temperatures
c)
mid-temperature
d)
none of thse options
113.
In what state of matter are most nonmetals at room temperature?
a)
solid
b)
gas
c)
liquid
d)
synthetic
114.
All ___ except mercury are solids at room temperature.
a)
metalloids
b)
metals
c)
nonmetals
d)
mixtures
115.
In general, nonmetals are...
a)
...good conductors of electricity.
b)
...good conductors of heat.
c)
...malleable and ductile.
d)
...gasses at room temperature.
116.
In general, metals are...
a)
...poor conductors of heat.
b)
...poor conductors of electricity.
c)
...brittle.
d)
...good conductors of heat.
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