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WorksheetsChemistry Unit 3 Review
Total questions: 92
Worksheet time: 3hrs 4mins
Fixed energies an electron can have
(a)
amount of energy required to move an electron from 1 energy level to another
(a)
Electrons can exist between energy levels
true
false
Where is the probability of finding an electron the highest?
in the nucleus
just outside the nucleus
far away from the nucleus
free
What is the max number of electrons in the 4th principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 1st principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 2nd principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 3rd principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 5th principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 6th principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
What is the max number of electrons in the 7th principal energy level? 2n2 is the formula to calculate. JUST TYPE THE NUMBER
(a)
States that electrons occupy the lowest energy level first
aufbau principle
Pauli exclusion principle
Hund's rule
States that an atomic orbital may have at most 2 electrons
aufbau principle
Pauli exclusion principle
Hund's rule
Electrons occupying the same energy level will spread out with the same spin 1st, then fill in the orbitals
aufbau principle
Pauli exclusion principle
Hund's rule
the height of a wave from zero to crest/trough
(a)
the distance between crests of a wave
(a)
number of waves that pass a given point per unit of time
(a)
SI unit for frequency
(a)
Elements all have the same atomic emission spectrum.
True
False
You can know the speed & velocity of an electron at the same time.
true
false
How many electrons can exist in the f subshells?
(a)
How many electrons can exist in the d subshells?
(a)
How many electrons can exist in the p subshells?
(a)
How many electrons can exist in the s subshells?
(a)
What letter represents the bottom 14 columns when writing the electron configurations?
(a)
What letter represents the middle ten columns when writing the electron configurations?
(a)
What letter represents the last six columns when writing the electron configurations?
(a)
What letter represents the first two columns when writing the electron configurations?
(a)
Which is the correct electron configuration for Oxygen?
1s2 2s2 2p4
1s2 2s2 2p6
1s2 2s2 2d4
1s2 2s1 2p4
Which is the correct electron configuration for Sodium?
1s2 2s2 2p6
1s2 2s2 2p63p1
[Ne] 3p1
[Ar] 3p1
Which is the correct electron configuration for Krypton?
1s2 2s2 2p6 3p2 3p6 4s2 3d10 4p6
[Kr]
[Ar]4s2 3d8 4p6
4s2 3d10 4p6
Which is the correct electron configuration for Rutherfordium?
[Xe]6s24f145d2
[Rn]6s24f145d2
[Xe]6s24f125d4
[Xe]6s24f145d5
Protons are located in the nucleus of the atom. A proton has...
No charge
A negative charge
A positive and negative charge
A positive charge
Neutrons are in the nucleus of the atom. A neutron has...
A positive charge
No charge
A negative charge
Twice as much positive charge as a proton
An electron is in a region outside the nucleus. An electron...
Is larger than a proton and has no charge
Has less mass than a proton and has a negative charge
Is smaller than a proton and has no charge
Has a positive charge
A hydrogen atom is made up of one proton and one electron. The proton and electron stay near each other because...
Positive and negative charges repel
Positive and positive charges repel
Positive and negative charges attract
Two negatives make a positive
The atomic number of an atom is...
The mass of the atom
The number of protons added to the number of neutrons
The number of protons
Negatively charged
The atoms of the same element can have different isotopes. An isotope of an atom...
Is an atom with a different number of protons
Is an atom with a different number of neutrons
Is an atom with a different number of electrons
Has a different atomic number
The atomic mass of an element is...
The average mass of all the isotopes of the element
A measure of the density of that element
The mass of the most common isotope of that element
The number of protons and electrons in the atoms of the element
An element and an atom are different but related because...
A particular element is made up of many different types of atoms
A molecule is the same as an atom
An element is made up of all the same type of atom
An element is smaller than an atom
The periodic table shows that a carbon atom has six protons. This means that a carbon atom also has
Six electrons
Six neutrons
More protons than electrons
An atomic mass that equals six
The atomic number of nitrogen is 7. The atomic mass is 14.01. This means that
All nitrogen atoms have exactly 7 neutrons
A small percentage of nitrogen atoms have fewer than 7 neutrons
A small percentage of nitrogen atoms have more than 7 neutrons
Some nitrogen atoms have fewer than 7 electrons
Electrons are in regions around the nucleus called energy levels. The first energy level
Is furthest from the nucleus
Is closest to the nucleus
Holds the most elecrons
Needs more than two electrons to fill it up
Neon has 10 protons and 10 electrons. The electrons fill the energy levels in Neon like this:
2 in the first, 2 in the second, and 6 in the third
4 in the first, 4 in the second, and 2 in the third
2 in the first, 4 in the second, and 4 in the third
2 in the first, and 8 in the second
The atoms in a column of the periodic table all have...
The same abbreviation
The same number of energy levels
The same number of electrons
The same number of electrons in the outer energy level
In the process of covalent bonding, atoms share electrons. This means that...
Electrons from each atom are attracted to the nucleus of both atoms
Protons and neutrons attract
Atoms lose electrons and become ions
Atoms gain electrons and become ions
In the process of ionic bonding
Both atoms gain electrons
One atom gains one or more electrons and the other loses the same number
Atoms switch protons
Both atoms lose electrons
In the process of ionic bonding, ions come together because...
Opposite charges repelt
Positive and negative ions attract
Salt is magnetic
Like charges attract each other
In a Lewis dot diagram, the electrons shown...
Are in the innermost energy level
Always equal the number of protons
Are in the outermost energy level
Always add up to an even number
Electrons are found in the nucleus of an atom.
True
False
Neutrons and electrons are attracted to one another.
True
False
The first energy level of an atom is closest to the nucleus.
True
False
In a covalent bond, electrons are shared between two atoms.
True
False
In an ionic bond, electrons are shared between two atoms.
True
False
It is possible to have a double covalent bond.
True
False
The smallest particle of an element that retains its identity in a chemical reaction.
atom
proton
neutron
nucleus
The theory that states the following: all elements are composed of atoms, atoms of the same element are identical, atoms of different elements can combine chemically to form compounds, chemical reactions occur when atoms are separated from one another.
Dalton's atomic theory
cathode ray
isotope
mass number
Negatively charged subatomic particles.
protons
neutrons
electrons
isotope
A glowing beam that traveled from the cathode to the anode.
cathode ray
nucleus
neutron
electron
Positively charged subatomic particles
protons
neutrons
electrons
nucleus
Subatomic particles with no charge.
protons
neutrons
electrons
isotope
The tiny central core of an atom and is composed of protons and neutrons.
isotope
nucleus
electron
atomic number
The number of protons in the nucleus of an atom of that element.
atomic number
mass number
atomic mass unit
atomic mass
The total number of protons and neutrons in an element
atomic mass
mass number
atomic mass unit
atomic mass
Atoms that have the same number of protons but different numbers of neutrons.
isotopes
atomic number
mass number
atomic mass
One twelfth of the mass of a carbon-12 atom
atomic mass unit
atomic mass
atomic number
mass number
A weighted average mass of the atoms in a naturally occurring sample of the element.
atomic mass
mass number
atomic number
isotope
Atoms of the same element can differ in ___________________.
chemical properties
mass number
atomic number
the number of protons and electrons
Dalton's atomic theory helped to explain the law of conservation of mass because it stated that atoms ___________________.
could not combine
were invisible
all had the same mass
could not be created or destroyed
Most of the volume of an atom is made up of the ___________________.
nucleus
nuclides
electron cloud
protons
The smallest particle of an element that retains all the chemical properties of that element is a(an) ___________________.
proton
neutron
isotope
atom
Atoms of one element that have different masses are called ___________________.
Isotopes
Neutron
Purines
Adenosines
How many neutrons does the isotope of lithium have?
8
3
4
5
How many neutrons does the isotope of lithium have?
48
26
52
37
In a correctly written symbol what would be located in the "A" position?
mass number
atomic number
atomic mass
proton number
What is the atomic number?
the number of protons
the number of protons and neutrons
the number of neutrons
the number of protons and electrons
What is the mass number?
the number of protons
the number of protons and neutrons
the number of neutrons
the number of protons and electrons
3. What is the atomic number of this atom?
1
3
4
7
What is the atomic number of Barium, Ba? (use your own periodic table)
20
38
56
88
7. How many protons are in a sodium atom, Na? (use your own periodic table)
Sodium has 1 proton.
Sodium has 3 protons.
Sodium has 11 protons
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most common?
204
206
207
208
Which element has gained two extra electrons?
Na2+
K2-
C+2
H
Ions are:
atoms with a positive or negative charge
atoms with no charge
atoms with ONLY a positive charge
atoms with ONLY a negative charge
How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
34
36
2
40
What do these isotopes of carbon all have in common?
neutrons and mass number
atomic mass and atomic number
protons and atomic number
electrons and atomic mass
a positively charged ion
(a)
the energy needed to remove an electron from an atom in the gaseous state
(a)
good conductor of heat & electricity
(a)
any nonmetal in Group 7A
(a)
the tendency of an atom to attract electrons when the atom is in a compound
(a)
an element in Group 2A
(a)
Most of the weight of an atom comes from the
nucleus
electrons
ions
isotopes
