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WorksheetsChemistry Review
Total questions: 181
Worksheet time: 2hrs 14mins
Synthesis
AB → A + B
A + B → AB
CxHy + O2 → CO2 + H2O
AB + CD →AD + BC
Decomposition
A + BC → B + AC
A + B → AB
AB + CD →AD + BC
AB → A + B
Combustion
A + B →AB
AB → A + B
CxHy + O2 → CO2 + H2O
A + BC →B + AC
Single Replacement
A + BC →B + AC
AB →A + B
AB + CD → AD + BC
CxHy + O2 → CO2 + H2O
Double Displacement
CxHy + O2 → CO2 + H2O
AB + CD → AD + BC
A + B →AB
A + BC → B + AC
( Single Displacement)
Sodium + Silver Phosphate →
3Na + AuPO4 → 3Au + Na3PO4
2Na + AgPO4 → 4Ag + NaPO4
3Na + AgPO4 →3Ag + Na3PO4
3Na + AgPO3 →3Ag + Na3PO3
(Double Displacement)
Sodium Chloride + Calcium Sulfate →
NaCI2 + SO4Ca2 →SO4Na + Ca2Cl
2NaCl + CaSO4 → Na2SO4 + CaCl2
3NaCl + CaSO3 → Na3SO3 + 3ClCa2
2NaCl + Ca3SO4 →NaCl3 + 3CaCl2
(Combustion)
limited CH4 + excess O2 → CO2 + H2O
Select two
Incomplete
Complete
CH4 +2O4 → CO2 + 2H2O
The reaction does not occur
(Combustion)
Excess CH4 + limited O2 →CO + H2O
Select two
Incomplete
Complete
2CH4 + 3O2 → 2CO + 4H2O
The reaction does not occur
Balance The Equation
P4O10 + H2O → H3PO4
(Feel free to use an equal sign instead of an arrow if needed, and subscripts can be beside an element)
(a)
This diagram represents a...
pure substance that is a compound
mixture of elements
mixture of compounds
pure substance that is an element
Alex goes into the garden and digs up a shovel full of dirt. This is a _____________ mixture.
Heterogenous
Homogeneous
Milk is a . . .
Heterogeneous mixture
homogeneous solution
Element
Compound
What is a homogeneous mixture?
a mixture that is the same throughout.
a mixture that is made up of one type of atom.
a mixture that is made up of one type of compound
a mixture that cannot be separated through physical changes
Physical properties are
properties that can be observed without changing the identity of the substance
properties that describe how a substance changes into a completely different substance
Which of the following is not a chemical property?
rusting
rotting
burning
boiling
This diagram represents a _____.
pure substance that is a compound
mixture of elements
mixture of compounds
pure substance that is an element
Which is an example of a physical property?
rusting
boiling point
combustion
reactivity with water
Sugar dissolves in water. This is an example of....
Physical Change
Chemical Change
Which is the best set of techniques to use for separating a mixture of water, sugar, and pebbles?
magnetism and crystallization
filtration and crystallization
filtration
filtration and magnetism
Which one of these is a chemical property?
melting point
color
flammability
boiling point
Evaporation is what kind of change?
chemical
physical
A pure substance that cannot be broken down into other substances by chemical or physical means.
compound
mixture
element
atom
Is melting point of a substance a physical or chemical property?
chemical
physical
The building block of matter is
mixture
atom
substance
element
When you freeze water, it turns to ice. What kind of change is this?
physical
chemical
The _________ of an element equals the number of protons in an atom of that element.
atomic number
neutrons
isotopes
mass number
If an element has 3 valence electrons, what charge will likely form on its ion ?
+3
+5
-3
-5
If an atom of oxygen has a charge of -2, how many electrons does the atom have?
6
8
18
10
What is the atomic number of the atom pictured?
9
10
18
19
How many protons does this isotope of titanium have?
48
22
26
70
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is
13
14
27
40
number of neutrons =
atomic number - mass number
isotope number - atomic weight
mass number - atomic weight
mass number - atomic number
Isotopes have different numbers of
neutrons
protons
electrons
properties
Atomic mass is equal to the number of...
Protons + Electrons
Electrons
Protons + Neutrons
Electrons + Neutrons
When an atom loses a valence electron, it becomes a(n) _____________ ion.
negative
positive
polyatomic
neutral
Where can you find the protons and neutrons?
outside the atom
electron cloud
nucleus
cytoplasm
Rounding the atomic weight to the nearest whole number gives us the _____
mass number
atomic number
electrons
neutrons
Atomic mass is equal to the number of...
Protons + Electrons
Electrons
Protons + Neutrons
Electrons + Neutrons
What is the atomic mass of the atom pictured?
9
10
18
19
How many neutrons does an atom of the isotope Neon-22 have?
10
12
22
20
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
20
10
5
25
Magnesium's ion
Mg+
Mg2-
Mg-
Mg2+
What is the mass number of an atom of gold with 117 neutrons?
197
117
196
196.97
How many neutrons does an atom of Nitrogen-13 have?
6
7
5
13
Ions are:
atoms with a positive or negative charge
atoms with no charge
atoms with ONLY a negative charge
atoms with ONLY a positive charge
If an atom of nickel has a charge of +3, how many electrons does the atom have?
28
25
31
26
What charge does the nucleus have?
negative
positive
neutral
How many protons does this isotope of titanium have?
48
22
70
26
How do you find atomic mass?
Multiply the protons by the neutrons
Subtract the number of protons and neutrons and divide by the atomic mass
Add the number of neutrons and protons
Multiply the number of protons by the atomic mass
average atomic mass is _______ the most abundant isotope(s) (the isotope(s) that is most common in nature)
average of
closest to
a combination of
We round the atomic mass to the nearest ________ if we don't know which isotope to use.
Halogen
Noble Gas
Whole number
Isotope
Carbons average mass is 12.011(carbon -12 is 99% in nature and carbon -13 is 1% in nature) ...so
The average is 11.213 (closest to one found more often in nature, Carbon - 12)
The average is 12.011 (closest to one found more often in nature, Carbon - 12)
The average is 13.076 (closest to one found more often in nature, Carbon - 12)
The average is 14.480 (closest to one found more often in nature, Carbon - 12)
Atomic radius
Components of an atom
Amount of atoms
Weight of an atom
Size of an atom
What is the ionic radius? (cations get smaller = + = lose electrons) and (anions get larger = - = gain electrons)
components of + or - ions
amount of + or - ions
size of + or - ion
weight of + or - ion
What is ionization energy?
energy to add an electron = easier the larger the atom is
energy to remove an electron = easier the larger the atom is
energy to remove an electron = easier to smaller the atom is
energy to add an electron = easier the smaller the atom is
What is electronegativity?
tendency to form negative ion in a chemical reaction ( leave out noble gases)
tendency to form positive ion in a chemical reaction (leave out noble gases)
tendency to form neutral ion in a chemical reaction (leave out noble gases)
What is shielding?
The process by which each element's valence electrons will at times "overshadow" another element's valence electrons
Orbitals
Energy levels
Valence electrons
What is nuclear charge?
Charge of a nucleus (protons)
Charge of an atom (protons)
Charge of nucleus (valence electrons)
Charge of an atom (valence electrons)
Radius increases...
up and right
down and left
up and left
down and right
Ionization energy increases
up and left
up and right
down and right
down and left
Electronegativety increases
up and right
up and left
down and left
down and right
Shielding increases
up
down
right
left
Non-metallic character increases
↙
↗
Metallic character increases
↙
↗
Select all that are true
Cations are +
Anions are +
Cations are -
Anions are -
What family is this?
Noble Gases
Alkaline Earth Metals
Alkali Metals
Halogens
What family is this?
Alkali Metals
Alkaline Earth Metals
Transition Metals
Halogens
What family is this?
Halogens
Noble Gases
Alkali Metals
Alkaline Earth Metals
What is the name of the purple group?
Halogens
Noble Gases
Transitions Metals
Alkali Metals
What is the name of the brown group?
Alkaline Earth Metals
Halogens
Alkali Metals
Transition Metals
What are the names of the families in white?
Lanthanide on top
Actinide on the bottom
Actinide on top
Lanthanide on the bottom
Post-Alakides on top
Alakolds on the bottom
Post-Alakides on top
Harlenthides on the bottom
What is true about ionic size?
The ionic size is when the atom loses or gains electrons to become ONLY positively charged
The ionic size is when the atom loses or gains neutrons to become negatively or positively charged isotopes
The ionic size is when the atom loses or gains electrons to become ONLY negatively charged
The ionic size is when the atom loses or gains electrons to become negatively or positively charged ions
Select all that are true
negative means subtract/lose so ion is smaller than neutral atom
positive means add/gain so ion is larger than neutral atom
negative means add/gain so ion is larger than neutral atom
positive means subtract / lose so ion is smaller than neutral atom
To excite an atom, there needs be...
Absorption of energy
Emission of energy
Movement of electrons
A proton
The principle quantum number, n, represents the:
spin value
suborbital value
energy level
magnetic value
Which shape represents the shape of an "s" orbital?
How many orbitals does an 's' sublevel have?
1
3
5
7
What is the shape of 'p' orbitals?
Dumbbell shaped
Peanut shaped
Spherical shaped
Hybrid structure
The number of orbitals in 'p' sub level
2
3
4
How many electrons can a d sublevel hold?
14
10
2
6
What are the orbitals for n=4
s
s, p
s, p, d
s, p, d, f
Number of electrons present in each orbital
2
3
4
A three-dimensional region around a nucleus where an electron may be found is called ---?
orbit
circle
orbital
circuit
What is the lowest energy state of an atom called?
the ground state
the excited state
the solid state
the chaotic state
How many orbitals does an s sublevel have?
1
3
5
7
How many orbitals does an f sublevel have?
1
3
5
7
What are the orbitals that make up the n=1 energy level?
s
s, p
s, p, d
s, p, d, f
Electrons fill energy levels and sublevels _____ in energy first.
lower
higher
1s22s22p63s1
(Sodium)
ionic configuration
regular configuration
shortcut configuration
rearranged configuration
[Kr] 4d105s25p5
(Iodine)
ionic configuration
regular configuration
shortcut configuration
rearranged configuration
1s22s22p63s23p6
(Calcium+2)
ionic configuration
regular configuration
shortcut configuration
rearranged configuration
1s22s22p63s23p63d104s24p6
(Gallium)
ionic configuration
regular configuration
shortcut configuration
rearranged configuration
1s22s22p63s23p64s23d10
Which color has the highest frequency?
red
orange
green
blue
What element matches this electron configuration?
1s22s22p63s2
Neon
Magnesium
Aluminum
Potassium
Which is the correct shape of each of the following
s= spherical
p= double donut
d= double dumbbell
f= dumbbell donut
s=spherical
p=dumbell
d= double dumbbell and 1 dumbbell donut
f= complex
s= spherical
p= double bell
d= dumbbell donut
f= complex sphere
Which is the correct amount of orbitals for each of the following
s= 1
p=3
d= 5
f=7
s=2
p=4
d=6
f=8
s=1
p=3
d=6
f=10
Which is the correct amount of electrons for each of the following
s= 1
p=3
d= 5
f=7
s=2
p=4
d=6
f=8
s=2
p=6
d=10
f=14
Electrons for each sublevel are:
s = 2
p = 6
d = 10
f = 14
True
False
Orbitals for each subelevel are:
s = 1
p = 3
d = 5
f = 7
True
False
What is true about 1s1?
The 1 is the # of electrons
The s is the sublevel
The 1 is the value of the energy level
It is the electron configuration for Hydrogen
All of these
What is true about Cd+2?
The +2 means that two electrons are lost
The +2 means that two electrons are gained
H2O
Ionic Bond
Both Bonds
Neither Bonds
Covalent Bonds
Metals have....
Select all that apply
Negatively charged electrons that act as glue to hold positively charged ions together
High melting points
Electrons that are delocalised and able to move (this is why they conduct)
A dull luster
If three electrons are available to fill three empty 2p atomic orbitals, how will the electrons be distributed in the three orbitals?
____in each orbital
One
Two
Three
Four
The total number of electrons in the highest level of the argon atom (atomic number 18) is___
7
8
9
10
If n = 2 how many orbitals are possible?
2
3
4
5
How many unpaired electrons are in a sulfur atom, which has the atomic number 16?
4
3
2
1
How many unshared pairs of electrons will the central atom of a bent molecule have?
1
2
3
4
Which of the following will have this geometry?
H2S
CCl4
NH3
HCl
Which of these molecules will have this molecular geometry?
PCl5
SF6
CF5
SnF4
Which of these molecules will have this molecular geometry?
SO4
CCl4
NH2
PCl4
Which of the following molecules has this molecular geometry?
PCl5
SiO4
SCl6
CH4
Which of the following molecules will have this molecular geometry?
SF4
CCl4
SiO4
CF2
Which of these molecules will have this molecular geometry?
BCl3
NH3
CO2
CCl4
Which of these molecules will have this molecular geometry?
H2S
CCl2
NH2
CO2
Which of these structures has one un-shared pairs of electrons?
Which of the following structures would you draw for CCl4 ?
Which of these would be the correct molecular geometry for water?
Which of the following has bond angles of 120 degrees?
tetrahedral
bent
trigonal planar
trigonal pyramidal
Which of these molecular shapes is definitely polar?
