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WorksheetsChemistry Final Exam #2
Total questions: 152
Worksheet time: 3hrs 32mins
What is the electron configuration of the gallium ion?
1s² 2s² 2p⁶ 3s² 3p⁶
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁶
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
The octet rule states that, in chemical compounds, atoms tend to have ____.
the electron configuration of a noble gas
more protons than electrons
eight electrons in their principal energy level
more electrons than protons
A compound held together by ionic bonds is called a ____.
diatomic molecule
polar compound
covalent molecule
salt
What is the formula unit of aluminum oxide?
AlO
Al₂O₃
AlO₃
Al₃O₂
Which of the following is true about the melting temperature of potassium chloride?
The melting temperature is relatively high.
The melting temperature is variable and unpredictable.
The melting temperature is relatively low.
Potassium chloride does not melt.
Which of the following is NOT a characteristic of most ionic compounds?
They are solids.
They have low melting points.
When melted, they conduct an electric current.
They are composed of metallic and nonmetallic elements.
Which of these elements does not exist as a diatomic molecule?
Ne
F
H
I
Why do atoms share electrons in covalent bonds?
to become ions and attract each other
to attain a noble-gas electron configuration
to become more polar
to increase their atomic numbers
Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules?
unvalenced pair
outer pair
inner pair
unshared pair
Which of the following diatomic molecules is joined by a double covalent bond?
O₂
Cl₂
N₂
He₂
When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____.
one-sided covalent bond
unequal covalent bond
coordinate covalent bond
ionic covalent bond
A bond formed between a silicon atom and an oxygen atom is likely to be ____.
ionic
coordinate covalent
polar covalent
nonpolar covalent
Which of the following covalent bonds is the most polar?
H—F
H—C
H—H
H—N
When placed between oppositely charged metal plates, the region of a water molecule attracted to the negative plate is the ____.
hydrogen region of the molecule
geometric center of the molecule
H—O—H plane of the molecule
oxygen region of the molecule
What type of ions have names ending in -ide?
only cations
only anions
only metal ions
only gaseous ions
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a ____.
prefix
suffix
Roman numeral following the name
superscript after the name
An -ate or -ite at the end of a compound name usually indicates that the compound contains ____.
fewer electrons than protons
neutral molecules
only two elements
a polyatomic anion
Which of the following compounds contains the Mn³⁺ ion?
MnS
MnBr₂
Mn₂O₃
MnO
How are chemical formulas of binary ionic compounds generally written?
cation on left, anion on right
anion on left, cation on right
Roman numeral first, then anion, then cation
subscripts first, then ions
Which of the following formulas represents an ionic compound?
CS₂
BaI₂
N₂O₄
PCl₃
Which element, when combined with fluorine, would most likely form an ionic compound?
Which of the following compounds contains the lead(II) ion?
PbO
PbCl₄
Pb₂O
Pb₂S
What is the correct formula for potassium sulfite?
(a)
Sulfur hexafluoride is an example of a ____.
monatomic ion
polyatomic ion
binary compound
polyatomic compound
In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by ____.
Roman numerals
superscripts
prefixes
suffixes
When dissolved in water, acids produce ____.
negative ions
polyatomic ions
hydrogen ions
oxide ions
When naming acids, the prefix hydro- is used when the name of the acid anion ends in ____.
-ide
-ite
-ate
-ic
When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ____.
-ous
-ic
-ate
-ite
What is the formula for phosphoric acid?
H₃PO₃
H₃PO₄
HPO₂
HPO₄
Suppose you encounter a chemical formula with H as the cation. What do you know about this compound immediately?
It is a polyatomic ionic compound.
It is an acid.
It is a base.
It has a +1 charge.
What does an -ite or -ate ending in a polyatomic ion mean?
Oxygen is in the formula.
Sulfur is in the formula.
Nitrogen is in the formula.
Bromine is in the formula.
What SI unit is used to measure the number of representative particles in a substance? (Hint-This word has multiple meanings)
(a)
Avogadro's number of representative particles is equal to one (a) .
What is the mass in grams of 5.90 mol C₈H₁₈?
0.0512 g
19.4 g
389 g
673 g
The lowest whole-number ratio of the elements in a compound is called the ____.
empirical formula
molecular formula
binary formula
representative formula
What does the symbol Δ in a chemical equation mean?
Heat is supplied to the reaction.
A catalyst is needed.
yields
precipitate
In the chemical equation H₂O₂(aq) → H₂O(l) + O₂(g), the O₂ is a ____.
catalyst
solid
product
reactant
This symbol (⇌) indicates that ____.
heat must be applied
an incomplete combustion reaction has occurred
a gas is formed by the reaction
the reaction is reversible
What are the coefficients that will balance the skeleton equation below? AlCl₃ + NaOH → Al(OH)₃ + NaCl
1, 3, 1, 3
3, 1, 3, 1
1, 1, 1, 3
1, 3, 3, 1
When the equation Fe + Cl₂ → FeCl₃ is balanced, what is the coefficient for Cl₂?
1
2
3
4
Chemical equations must be balanced to satisfy ____.
the law of definite proportions
the law of multiple proportions
the law of conservation of mass
Avogadro’s principle
In every balanced chemical equation, each side of the equation has the same number of ____.
atoms of each element
molecules
moles
coefficients
What are the missing coefficients for the skeleton equation below?
Al₂(SO₄)₃(aq) + KOH(aq) → Al(OH)₃(aq) + K₂SO₄(aq)
(a)
The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a ______.
combination reaction
decomposition reaction
single-replacement reaction
double-replacement reaction
Which of the following is a balanced equation representing the decomposition of lead(IV) oxide?
PbO2 → Pb + 2O
PbO2 → Pb + O2
Pb2O → 2Pb + O
PbO → Pb + O2
In the activity series of metals, which metal(s) will displace hydrogen from an acid?
only metals above hydrogen
only metals below hydrogen
any metal
only metals from Li to Na
If a combination reaction takes place between rubidium and bromine, the chemical formula for the product is ______.
RuBr
Rb2Br
RbBr2
RbBr
What is the molarity of a solution that contains 6 moles of solute in 2 liters of solution?
6M
12M
7M
3M
What is the molarity of a solution containing 7.0 moles of solute in 569 mL of solution?
81M
0.081M
12M
4.0M
Where would the electrons be located?
Label the three parts of an electron configuration:
protons
section
family
period (row)
block (orbital)
electrons
group
The image shows the partial electron configuration of manganese (Mn). Below there are two empty boxes. Correctly drag the final two answers in the correct order to finish its electron configuration.
(a) (b)
Match the following
a
d
b
f
c
e
Match the following
1s2 2s2 2p4
oxygen
1s2 2s2 2p6 3s2 3p6 4s1
potassium
1s2 2s2 2p6
neon
1s2 2s2 2p6 3s2 3p2
silicon
1s2 2s2 2p6 3s2
magnesium
Match the element to the configuration that will be SIMILAR to it's configuration:
magnesium
1s2 2s2 2p6 3s2 3p6 4s2
lithium
1s2 2s2 2p6 3s1
boron
1s2 2s2 2p6 3s2 3p1
nitrogen
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
iodine
1s2 2s2 2p6 3s2 3p5
The 2,8,8 rule means the first shell is filled with (a) electrons, the second is filled with 8 (b) , and the third is filled with 8.
In an ionic bond, electrons are (a) from the (b) to the (c) . Ionic bonds are (d) because of the big difference in electronegativity.
Match the following to form true statements:
When solid, ionic compounds
cannot conduct electricity
When melted ionic compounds
can conduct electricity
Ionic compounds have
high melting and high boiling points
There are many strong bonds
between ions in an ionic compound.
Elements in group 1 of the periodic table form ions
with a charge of 1+
A metal (M) in group 2 forms a compound with a nonmetal in group 17 (X).
The formula for this ionic compound will be M (a) X (b)
Ionic bonds are formed by transferring an electron from a (a) to a nonmetal.
(a) form a (b) structure because of their opposite charges while (c) form (d) from shared valence electrons.
Match the following
valence electron
energy level of an electron
covalent
sharing of electron pairs
ionic
transfer of electrons
reactivity
ability to undergo chemical reactions
oxidation state
charge of an atom
Match the following
One shared pair of electrons
Single Bond
Two shared pairs of electrons
Double Bond
Three shared pairs of electrons
Triple Bond
Ionic bonds (a) electrons and are between (b)
The proper formula for magnesium hydroxide.
MgOH
Mg2OH
Mg(OH)2
Mg2OH2
Match the charge with the groups.
-1
Group 17
-3
Group 15
-2
Group 16
Match the charge with the groups.
+1
Group 1
+2
Group 2
+3
Group 3
Match the following to form true statements:
When solid, ionic compounds
cannot conduct electricity
When melted ionic compounds
can conduct electricity
Ionic compounds have
high melting and high boiling points
There are many strong bonds
between ions in an ionic compound.
Elements in group 1 of the periodic table form ions
with a charge of 1+
Find an element with similar chemical properties to Barium (Ba).
Ca an Ra, because they are in the same group and have similar chemical properties.
Cs and La, b/c they are in the same period number.
Ca and Y, b/c they are 90 degree angle and have similiar properties.
Potassium is in group (a) period (b) , it is a (c) .
1 reactant breaks apart into 2 or more smaller products
decomposition
2 or more reactants combine to make 1 product
synthesis
O2 as a reactant & CO2 and water as products
combustion
1 element & 1 compound in products & reactants
single replacement
2 compounds in reactants & products
double replacement
In a chemical equation, a reactant or product labeled (a) is a solid and a reactant or product labeled (b) is dissolved in water
The (a) are on the right side of the arrow and the (b) are on the left side of the arrow.
Identify the type of chemical reaction (a)
fireworks exploding (a)
What type of reaction is this?3KOH + H3PO4 --> K3PO4 + 3H2O (a)
When acids are mixed with water, they release (a) ions.
Identify the ion.
Hydrogen
H+
Hydroxide
OH-
Hydronium
H3O+
These electrons are in the outermost energy level of an atom - you can also decipher how many of these electrons orbit atoms based on their Periodic Table group number:
Neutrons
Protons
Ions
Valence electrons
What atom matches this electron configuration?
[Xe] 6s24f145d9
Mercury
Gold
Platinum
Thallium
What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl?
4.9 L
0.20 L
1.2 L
1.17 gram
All of the following are physical properties of matter EXCEPT ____.
mass
color
melting point
ability to rust
Which state of matter has a definite volume and takes the shape of its container?
solid
liquid
gas
both b and c
Which of the following is a heterogeneous mixture?
air
salt water
steel
soil
Which of the following is a heterogeneous mixture?
vinegar in water
milk
oil and vinegar
air
A substance that can be separated into two or more substances only by a chemical change is a(n) ____.
solution
element
mixture
compound
Which of the following is a chemical property?
color
hardness
freezing point
ability to react with oxygen
Which of the following is NOT a physical change?
grating cheese
melting cheese
fermenting of cheese
mixing two cheeses in a bowl
The chemical symbol for iron is ____.
fe
FE
Fe
Ir
Which of the following does NOT involve a physical change?
mixing
melting
grinding
decomposing
A chemical change occurs when a piece of wood ____.
is split
is painted
decays
is cut
When an iron nail is ground into powder, its mass ____.
stays the same
decreases
increases
cannot be determined
The expression of 5008 km in scientific notation is ____.
5.008 x 10^3 km
50.08 x 10^4 km
5.008 x 10^-3 km
5.008 x 10^4 km
The closeness of a measurement to its true value is a measure of its ____.
precision
accuracy
reproducibility
usefulness
The smallest particle of an element that retains the properties of that element is a(n) ____.
atom
electron
proton
neutron
Which of the following is NOT a part of Dalton's atomic theory?
All elements are composed of atoms.
Atoms are always in motion.
Atoms of the same element are identical.
Atoms that combine do so in simple whole-number ratios
Which of the following is true about subatomic particles?
Electrons are negatively charged and are the heaviest subatomic particle.
Protons are positively charged and the lightest subatomic particle.
Neutrons have no charge and are the lightest subatomic particle.
The mass of a neutron nearly equals the mass of a proton.
All atoms are ____.
positively charged, with the number of protons exceeding the number of electrons
negatively charged, with the number of electrons exceeding the number of protons
neutral, with the number of protons equaling the number of electrons
neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutrons
As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to be true?
Protons, electrons, and neutrons are evenly distributed throughout the volume of the atom.
The nucleus is made of protons, electrons, and neutrons.
Electrons are distributed around the nucleus and occupy almost all the volume of the atom.
The nucleus is made of electrons and protons.
The nucleus of an atom is ____.
the central core and is composed of protons and neutrons
positively charged and has more protons than neutrons
negatively charged and has a high density
negatively charged and has a low density
The atomic number of an element is the total number of which particles in the nucleus?
neutrons
protons
electrons
protons and electrons
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.
The sum of the protons and neutrons in an atom equals the ____.
atomic number
nucleus number
atomic mass
mass number
What does the number 84 in the name krypton-84 represent?
the atomic number
the mass number
the sum of the protons and electrons
twice the number of protons
All atoms of the same element have the same ____.
number of neutrons
number of protons
mass numbers
mass
Isotopes of the same element have different ____.
numbers of neutrons
numbers of protons
numbers of electrons
atomic numbers
In which of the following is the number of neutrons correctly represented?
19, 9 F has 0 neutrons.
75, 33 As has 108 neutrons.
24, 12 Mg has 24 neutrons.
238, 92 U has 146 neutrons.
What unit is used to measure weighted average atomic mass?
amu
gram
angstrom
nanogram
In the Bohr model of the atom, an electron in an orbit has a fixed ____.
position
color
energy
size
What is the shape of the 3p atomic orbital?
sphere
dumbbell
bar
two perpendicular dumbbells
What is the maximum number of d orbitals in a principal energy level?
1
2
3
5
The shape (not the size) of an electron cloud is determined by the electron's ____.
energy sublevel
position
speed
principal quantum number
What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p?
2d
3d
3f
4s
What is the electron configuration of potassium?
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹
1s² 2s² 2p¹⁰ 3s² 3p³
1s² 2s² 3s² 3p⁶ 3d¹
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
Which of the following elements is in the same period as phosphorus?
carbon
magnesium
nitrogen
oxygen
Each period in the periodic table corresponds to ____.
a principal energy level
an energy sublevel
an orbital
a suborbital
The modern periodic table is arranged in order of increasing atomic ____.
mass
charge
number
radius
Of the elements Pt, V, Li, and Kr, which is a nonmetal?
Pt
V
Li
Kr
What element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p²?
nitrogen
selenium
silicon
silver
Which subatomic particle plays the greatest part in determining the properties of an element?
proton
electron
neutron
none of the above
What is the charge of a cation?
a positive charge
no charge
a negative charge
The charge depends on the size of the nucleus.
The metals in Groups 1A, 2A, and 3A ____.
gain electrons when they form ions
form ions with a negative charge
all have ions with a 1+ charge
lose electrons when they form ions
How many valence electrons are in an atom of phosphorus?
2
3
4
5
What is the electron configuration of the gallium ion?
1s² 2s² 2p⁶ 3s² 3p⁶
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁶
1s² 2s² 2p⁶ 3s² 3p⁵ 3d¹
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰
The octet rule states that, in chemical compounds, atoms tend to have ____.
the electron configuration of a noble gas
more protons than electrons
eight electrons in their principal energy level
more electrons than protons
What is the formula unit of aluminum oxide?
AlO
Al₂O
AlO₃
Al₂O₃
Which of the following is NOT a characteristic of most ionic compounds?
They are solids.
They have low melting points.
When melted, they conduct an electric current.
They are composed of metallic and nonmetallic elements.
Which of these elements does not exist as a diatomic molecule?
Ne
F
H
I
Why do atoms share electrons in covalent bonds?
to become ions and attract each other
to attain a noble-gas electron configuration
to become more polar
to increase their atomic numbers
What type of ions have names ending in -ide?
only cations
only anions
only metal ions
only gaseous ions
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a ____.
prefix
suffix
Roman numeral following the name
superscript after the name
An -ate or -ite at the end of a compound name usually indicates that the compound contains ____.
fewer electrons than protons
neutral molecules
only two elements
a polyatomic anion
Which element, when combined with fluorine, would most likely form an ionic compound?
lithium
carbon
phosphorus
chlorine
