WorksheetsChemistry Spring Final 2020
Total questions: 86
Worksheet time: 2hrs 5mins
A bright-line spectrum of an atom is caused by the energy released when electrons
jump to a higher energy level
jump to a lower energy level
absorb energy and jump to a higher energy level
absorb energy and jump to a lower energy level
The part of the atom where the electrons will NOT be found is in the
area surrounding the nucleus
nucleus
electron cloud
orbitals
The major difference between a 1s orbital and a 2s orbital is that
the 2s orbital can hold more electrons
the 2s orbital has a slightly different shape
the 2s orbital is at a higher energy level
the 1s orbital can have only one electron
What is the total number of electrons needed to fill the fourth main energy level?
4
8
16
32
From the following elements, select the element in which two of the 3p ORBITALS are completely filled.
silicon (atomic number 14)
phosphorous (atomic number 15)
sulfur (atomic number 16)
chlorine (atomic number 17)
If electromagnetic radiation A has a lower frequency than radiation B, then that would mean the wavelength of A is ____than the wavelength of B.
Longer
Shorter
equal
exactly have the size of B.
For an electron in an atom to change from ground state to an excited state
energy must be released
energy must be absorbed
radiation must be emitted
transitions from higher to lower energy levels must occur
A three-dimensional region around a nucleus in which an electron may be found is called a(n)
spectral line
electron path
orbital
orbit
What orbital will never exist
3d
8s
6d
3f
For the d sublevel, the number of orbitals is
5
9
16
18
The energy level that is filled with 8 electrons is the
1st energy level
2nd energy level
3rd energy level
4th energy level
The farther an electron is from the nucleus, the more ___ it has
charge
energy
mass
size
The total number of electrons in the outer shell of a sodium atom is
1
2
8
18
The maximum number of electrons that can occupy the 2nd shell of an atom of magnesium is
1
2
8
18
What is the correct electron arrangement for sulfur? (Think about electron shells/energy levels!)
2-8-6
2-8-8
4-6-2
2-8-4
The chemical bond formed when two atoms SHARE electrons is called a(n)
covalent bond
ionic bond
metallic bond
electron bond
Which pair of atoms will combine with each other and form an ionic bond?
C and O
C and H
Ca and Mg
Ca and Br
Which element is most likely to GAIN electrons in a chemical reaction?
Kr
K
Br
Ca
What is the oxidation number (charge) of oxygen in most compounds?
6
-2
8
0
Which formula represents a substance that contains COVALENT bonds?
LiCl
CaCl2
K2O
CO2
How does an atom of aluminum become an ion?
it gains 3 electrons
it gains 3 protons
it loses 3 electrons
it loses 3 neutrons
How many electrons are shared within a single bond?
0
1
2
4
Which atoms are MOST LIKELY to form covalent bonds?
metal atoms that share electrons
metal atoms that share protons
nonmetal atoms that share electrons
nonmetal atoms that share protons
The electrons that are lost, gained, or shared in chemical bonds are called _____
valence electrons
chemical electrons
Lewis electrons
none of the above
Which of the following is the correct name for a compound between Magnesium and Sulfur?
Magnesium sulfur
Magnesium sulfide
Magnesium (II) sulfide
Dimagnesium disulfide
Name the acid with the formula HNO3
Nitrous Acid
Nitric Acid
Hydonitrous acid
Acid Trioxide
Which of the following is an acid
ZnCl2
CCl4
HCl
NaCl
What is the oxidation number of magnesium in THIS molecule of MgO?
-1
0
+1
+2
What is the oxidation number of sulfur in THIS molecule of SO2?
0
+1
+2
+4
Which atom is most likely to form a 3+ ion?
Li
Sr
Kr
Fe
P
Calcium reacts with fluorine to form an ionic solid. The correct formula for this solid is
CaF2
CF2
CaF
Ca2F
What is the correct formula for chromium (III) when bonded to a sulfate ion
Cr3(SO4)2
Cr2(SO4)3
Cr(SO4)2
Cr2SO4
How many atoms of silver do you need to bond with a nitrate ion?
1
2
3
4
How many nitrogen atoms do you need to bond with three lithium atoms?
1
2
3
4
Electron transfer is another name for
ionic bonding
electron sharing
covalent bonding
valence electrons
If three electrons were removed from a sodium atom, the new particle would be represented as
Na+
Na2+
Na3+
Na4+
In order for the reaction 2Al + 6HCl --> 2AlCl3 + 3H2 to occur, which of the following must be true
Al must be above Cl on the activity series
Al must be above H on the activity series
Heat must be supplied for the reaction
A precipitate must be formed
The type of reaction that takes place when one element reacts with a compound to form a new compound an different element is a ___
combination reaction
decomposition reaction
single-replacement reaction
double-replacement reaction
A decomposition chemical reaction can be compared to
two dancing couple switching partners
eight couples doing a square dance
a dancing couple breaking up
two single people joining for dance
The reaction 2KClO3 --> 2KCl + 3O2 is a(n)
synthesis reaction
decomposition reaction
combustion reaction
Double replacement reaction
Which of the following type of chemical reaction results in a single (1) product
combination/synthesis reaction
decomposition reaction
single replacement reaction
double replacement reaction
What are the correct coefficients when this equation is balanced K + Br2 --> KBr
1,1,1
1,2,1
2,1,2
2,1,1
What are the correct coefficients when this chemical equation is balanced? P4 + O2 --> P2O5
4,2,7
2,5,4
1,1,1
1,5,2
What are the coefficients needed to balance the chemical equation below?
Al + FeO --> Fe + Al2O3
2,3,3,1
3,3,3,1
2,1,1,1
1,2,1,2
The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following models of a chemical reaction best represents the law of conservation of mass?
If an element is diatomic it should have a subscript of___
1, always
2, only when it is an element
it shouldn't have a subscript, it should have a coefficent
2, when bonded in a compound
Predict the products of this synthesis reaction: H2 + Cl2 →
HCl
H2Cl2
H2Cl
HCl2
Predict the products for the this Single Replacement reaction:
K + HCl →
KCl + H2
KHCl
KH + Cl2
HCl + K2
Predict the products for the this Double Replacement reaction:
AgNO3 + KCl →
AgCl + KNO3
AgK + ClNO3
KAg + NO3Cl
AgCl + 3 KNO
Complete the balanced equation for this Double Replacement reaction.
3 NaOH + Fe(NO3)3 →
NaFe + OH(NO3)3
NaNO3 + Fe(OH)3
3 NaNO3 + Fe(OH)3
3 NaFe + 3 (OH)NO3
Predict the product of this synthesis reaction:
Al + S₈ →
AlS
AlS8
Al2S
Al2S3
Predict the products for the decomposition of aluminum oxide, Al2O3 →
Al + O2
O + Al2
Al2 + O3
Al + O
Predict the products of this single replacement reaction: Na + H2O →
NaO + H2
NaOH + H2
NaH + O2
ONaH
What atom matches this electron configuration?
[Xe] 6s24f145d9
Mercury
Gold
Platinum
Thallium
What is the oxidation number of Fe in FeCl3?
-3
-2
+2
+3
What is the oxidation number of Cl in FeCl3?
-3
-1
+1
+3
What is the oxidation number of Cl in ClO3- ?
-1
+1
+5
+6
What is the oxidation state of S in SO42-?
+2
+4
+6
+8
1s22s22p63s23p6
4s23d104p6
What is the correct Lewis Dot Structure for ammonia NH3
Which is the correct molecular structure for carbon dioxide?
How many total valence electrons are participating in bonding in the molecule above?
8
4
2
3
CCl4 has how many double bonds?
0
1
2
3
represented by the symbol h; equal to 6.626 × 10^-34 J•s, where J is the symbol for the joule
de Broglie equation
planck's constant
electron-dot structure
Heisenberg uncertainty principle
The frequency of violet light is 7.5x1014 Hz. What is its wavelength?
4.0x10-7 m
4.0x107 m
2.25x1023m
2.25x1023 Hz
Red light has a wavelength of 675 x 10-9 m. What is its frequency?
2.03x1011 m
4.44x1014 Hz
4.44x1014 nm
2.03x1011 Hz
What is the speed of light?
3.0x108 ms
3.0x108 m/s
6.626x10-34 Js
6.626x10-34 J/s
What is Planck's Constant?
6.63x10-34 Js
6.63x10-34 J/s
3.0x108 ms
3.0x108 m/s
If a photon has frequency = 2.00 x 1014 Hz and the speed of light = 3.00 x 108 m/s, then what is its wavelength?
1.5 nm
1500 m
1500 nm
6.00 x 1022 m
