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Atomic Structure Review
Which of the following is NOT true about
electrons?
a) They have a negative charge
b) They are the heaviest subatomic particle
c) They are the lightest subatomic particle
d) They are located outside the nucleus
Atomic Structure Review
What is the relative mass of an electron?
a) 1/1840 the mass of a hydrogen atom
b) 1/1840 the mass of a proton + neutron
c) 1/1840 the mass of a carbon-12 atom
d) 1/1840 the mass of an alpha particle
Atomic Structure Review
Which of the following is NOT true about
protons?
a) They are one of the heaviest subatomic
particles
b) They are located in the nucleus
c) They have a positive charge
d) They always equal the number of
neutrons in an atom
Atomic Structure Review
Which of the following is true about subatomic
particles?
a) Electrons are negatively charged and are
the heaviest subatomic particle.
b) Protons are positively charged and the
lightest subatomic particle.
c) Neutrons have no charge and are the
lightest subatomic particle.
d) The mass of a neutron nearly equals the
mass of a proton.
Atomic Structure Review
The number of electrons in a neutral atom is
equal to the number of protons and
neutrons.
a) True
b) False
Atomic Structure Review
The atomic number of an element is equal
to the total number of which particles in the
nucleus?
a) Protons
b) Electrons
c) Neutrons
d) Protons and neutrons
Atomic Structure Review
Atoms are mostly empty space
a) True
b) False
Atomic Structure Review
Atoms of the same element can have
different masses.
a) True
b) False
Atomic Structure Review
The number of neutrons in the nucleus of an
atoms is found by subtracting the atomic
number from the mass number of the
isotope.
a) True
b) False
Atomic Structure Review
In an isotope symbol, the atomic number is
in the top left corner.
a) True
b) False
Atomic Structure Review
The mass number of an isotope is equal to
the number of
a) Protons
b) Neutrons + protons
c) Electrons + protons
d) electrons
Atomic Structure Review
The nucleus of an atom is positively charged
and has more protons than neutrons.
a) True
b) False
Atomic Structure Review
There are _____ neutrons in an atom of
phsohporus-32.
a) 15
b) 32
c) 49
d) 17
Atomic Structure Review
Isotopes of the same element have different
numbers of protons.
a) True
b) False
Atomic Structure Review
The top number in an isotope symbol is
always the
a) Atomic number
b) Number of neutrons
c) Number of protons
d) Mass number
Atomic Structure Review
The isotope tritium has _____ neutrons
a) 0
b) 1
c) 2
d) 3
Atomic Structure Review
In the name fluorine-19, the 19 represents
a) The mass number
b) The atomic number
c) The number of protons and electrons
d) The number of neutrons
Atomic Structure Review
The average atomic mass of copper is 63.55
amu. Which isotope is most abundant?
a) Copper-63
b) Copper-65
Atomic Structure Review
One atomic mass unit is equal to which of
the following
a) The mass of a hydrogen-1 atom
b) The mass of one electron
c) The mass of one carbon-12 atom
d) One-twelfth the mass of a carbon-12
atom
Atomic Structure Review
The atomic mass of an element depends
upon the
a) Mass of each electron in that element
b) Mass of each isotope of that element
c) Relative abundance of protons in that
element
d) Mass and relative abundance of each
isotope of that element
Atomic Structure Review
What unit is used to measure average
atomic mass?
a) Angstrom
b) Gram
c) Nanogram
d) Amu