1 Which of the Following Has the Least Mass
1st 9 Weeks Pre-IB / Pre-AP Chemistry Fall 2011
6 Week Exam PLEASE DO NOT WRITE ON EXAM!!
1 Which of the following has the least mass
in an atom?
A neutron
B proton
C electron
D nucleus
2 An atom that is electrically neutral must
contain
A fewer neutrons than protons
B equal numbers of electrons and
protons
C equal number of electrons and
neutrons
D no electrons in its outer shell
3 Which of the following statements is
most accurate regarding atoms?
A Most atoms cannot combine with
other atoms.
B Chemical reactions divide atoms into
smaller units.
C Atoms of the same element may
have different mass numbers.
D Atoms only contain protons.
4 The cathode ray experiments lead to
which particle being discovered?
A nucleus
B proton
C neutron
D electron
5 The proton, in Rutherford’s
experiments, were used to —
A identify chemical properties
B identify the melting point
C determine molecular mass
D bombard sheets of gold
6 An isotope of mercury has 80 protons
and 120 neutrons. What is the mass
number of this isotope?
A 80
B 120
C 200
D 201
7 How many neutrons would Sulfur-34
have?
A 16
B 18
C 20
D 32
8 Which of the following statements
describes isotopes of an atom?
A different chemical properties
B different numbers of protons
C different masses
D different numbers of electrons
9 Any atom that is electrically neutral
must contain —
A more protons than electrons
B equal numbers of electrons and
protons
C fewer neutrons than nucleons
D equal numbers of nucleons and
Neutrons
10 How many protons and neutrons are in
one atom of 1430Si?
A 14 protons and 14 neutrons
B 14 protons and 16 neutrons
C 16 protons and 14 neutrons
D 16 protons and 16 neutrons
11 Which part of an atom has the least
mass?
A electron
B neutron
C nucleus
D proton
12 Which of the following is the area
outside the nucleus where electron is
found?
A quantum number
B electron configuration
C electron orbit
D electron cloud
13 Which of the following showed
electrons in specific, fixed orbits?
A Rutherford Model
B Planck Model
C Bohr Model
D Quantum Model
14 Which nuclear particle has the same
relative mass as the proton, but has no
electrical charge?
A electron
B neutron
C isotope
D quark
1 Which nuclear particle has the same
relative mass as the proton, but has no
electrical charge?
A electron
B neutron
C isotope
D quark
2 Which of the following has the least mass
in an atom?
A neutron
B proton
C electron
D nucleus
3 Which of the following showed
electrons in specific, fixed orbits?
A Rutherford Model
B Planck Model
C Bohr Model
D Quantum Model
4 An atom that is electrically neutral must
contain
A fewer neutrons than protons
B equal numbers of electrons and
protons
C equal number of electrons and
neutrons
D no electrons in its outer shell
5 Which of the following is the area
outside the nucleus where electron is
found?
A quantum number
B electron configuration
C electron orbit
D electron cloud
6 Which of the following statements is
most accurate regarding atoms?
A Most atoms cannot combine with
other atoms.
B Chemical reactions divide atoms into
smaller units.
C Atoms of the same element may
have different mass numbers.
D Atoms only contain protons.
7 Which part of an atom has the least
mass?
A electron
B neutron
C nucleus
D proton
8 The cathode ray experiments lead to
which particle being discovered?
A nucleus
B proton
C neutron
D electron
9 How many protons and neutrons are in
one atom of 1430Si?
A 14 protons and 14 neutrons
B 14 protons and 16 neutrons
C 16 protons and 14 neutrons
D 16 protons and 16 neutrons
10 The proton, in Rutherford’s
experiments, were used to —
A identify chemical properties
B identify the melting point
C determine molecular mass
D bombard sheets of gold
11 Any atom that is electrically neutral
must contain —
A more protons than electrons
B equal numbers of electrons and
protons
C fewer neutrons than nucleons
D equal numbers of nucleons and
Neutrons
12 An isotope of mercury has 80 protons
and 120 neutrons. What is the mass
number of this isotope?
A 80
B 120
C 200
D 201
13 Which of the following statements
describes isotopes of an atom?
A different chemical properties
B different numbers of protons
C different masses
D different numbers of electrons
14 How many neutrons would Sulfur-34
have?
A 16
B 18
C 20
D 32
1 The cathode ray experiments lead to
which particle being discovered?
A nucleus
B proton
C neutron
D electron
2 How many protons and neutrons are in
one atom of 1430Si?
A 14 protons and 14 neutrons
B 14 protons and 16 neutrons
C 16 protons and 14 neutrons
D 16 protons and 16 neutrons
3 The proton, in Rutherford’s
experiments, were used to —
A identify chemical properties
B identify the melting point
C determine molecular mass
D bombard sheets of gold
4 Any atom that is electrically neutral
must contain —
A more protons than electrons
B equal numbers of electrons and
protons
C fewer neutrons than nucleons
D equal numbers of nucleons and
Neutrons
5 An isotope of mercury has 80 protons
and 120 neutrons. What is the mass
number of this isotope?
A 80
B 120
C 200
D 201
6 Which of the following statements
describes isotopes of an atom?
A different chemical properties
B different numbers of protons
C different masses
D different numbers of electrons
7 How many neutrons would Sulfur-34
have?
A 16
B 18
C 20
D 32
8 Which nuclear particle has the same
relative mass as the proton, but has no
electrical charge?
A electron
B neutron
C isotope
D quark
9 Which of the following has the least mass
in an atom?
A neutron
B proton
C electron
D nucleus
10 Which of the following showed
electrons in specific, fixed orbits?
A Rutherford Model
B Planck Model
C Bohr Model
D Quantum Model
11 An atom that is electrically neutral must
contain
A fewer neutrons than protons
B equal numbers of electrons and
protons
C equal number of electrons and
neutrons
D no electrons in its outer shell
12 Which of the following is the area
outside the nucleus where electron is
found?
A quantum number
B electron configuration
C electron orbit
D electron cloud
13 Which of the following statements is
most accurate regarding atoms?
A Most atoms cannot combine with
other atoms.
B Chemical reactions divide atoms into
smaller units.
C Atoms of the same element may
have different mass numbers.
D Atoms only contain protons.
14 Which part of an atom has the least
mass?
A electron
B neutron
C nucleus
D proton
1 An isotope of mercury has 80 protons
and 120 neutrons. What is the mass
number of this isotope?
A 80
B 120
C 200
D 201
2 Which of the following statements
describes isotopes of an atom?
A different chemical properties
B different numbers of protons
C different masses
D different numbers of electrons
3 How many neutrons would Sulfur-34
have?
A 16
B 18
C 20
D 32
4 Which of the following is the area
outside the nucleus where electron is
found?
A quantum number
B electron configuration
C electron orbit
D electron cloud
5 Which of the following statements is
most accurate regarding atoms?
A Most atoms cannot combine with
other atoms.
B Chemical reactions divide atoms into
smaller units.
C Atoms of the same element may
have different mass numbers.
D Atoms only contain protons.
6 Which part of an atom has the least
mass?
A electron
B neutron
C nucleus
D proton
7 Any atom that is electrically neutral
must contain —
A more protons than electrons
B equal numbers of electrons and
protons
C fewer neutrons than nucleons
D equal numbers of nucleons and
Neutrons
8 Which nuclear particle has the same
relative mass as the proton, but has no
electrical charge?
A electron
B neutron
C isotope
D quark
9 Which of the following has the least mass
in an atom?
A neutron
B proton
C electron
D nucleus
10 Which of the following showed
electrons in specific, fixed orbits?
A Rutherford Model
B Planck Model
C Bohr Model
D Quantum Model
11 An atom that is electrically neutral must
contain
A fewer neutrons than protons
B equal numbers of electrons and
protons
C equal number of electrons and
neutrons
D no electrons in its outer shell
12 The cathode ray experiments lead to
which particle being discovered?
A nucleus
B proton
C neutron
D electron
13 How many protons and neutrons are in
one atom of 1430Si?
A 14 protons and 14 neutrons
B 14 protons and 16 neutrons
C 16 protons and 14 neutrons
D 16 protons and 16 neutrons
14 The proton, in Rutherford’s
experiments, were used to —
A identify chemical properties
B identify the melting point
C determine molecular mass
D bombard sheets of gold
4