Download Review Questions

Why was Dalton’s idea of the atom considered a
theory while Democritus’ idea was considered a
hypothesis?
A.
B.
C.
D.
Democritus was born in Thrace.
Dalton had evidence to support his ideas.
No one agreed with Democritus.
Dalton had a college degree.
What statement about theories is correct.
A. All scientists must agree with an idea for it to
be considered a theory.
B. Theories can be proven correct.
C. Scientists usually create an entirely new
theory when evidence is found that
contradicts a current theory.
D. Scientists modify theories to explain new
evidence.
Dalton’s atomic theory is described by the four statements
below.
1. All matter is composed of indivisible particles called
atoms.
2. All atoms of the same element are identical.
3. Atoms of different elements combine to form compounds.
4. In a compound elements always combine in the same
way.
Which statement(s) are not part of the current atomic theory
A.
B.
C.
D.
1 only
2 only
3 only
4 only
E. 1 and 2
F. 2 and 3
G. 1 and 3
H. 2 and 4
The central core of the atom is the
A.
B.
C.
D.
Electron
Neutron
Nucleus
Proton
What statement correctly describes the nucleus.
A. The nucleus is a small, dense negatively
charged center of the atom.
B. The nucleus is the large volume of mainly
empty space that contains the electrons.
C. The nucleus contains most of the atom’s
mass and is positively charged.
D. The nucleus contains most of the atom’s
volume and is positively charged.
What is a theory?
A. A statement that describes what happens.
B. A well tested idea that explains why things
happen.
C. A prediction of what will happen in an
experiment.
D. A visual, graphical or mathematical
representation of an object or system.
What statement correctly describes electrons.
A. Negatively charged particles found in the
nucleus.
B. Negatively charged particles found in the
cloud around the nucleus.
C. Neutral particles found in the nucleus.
D. Positively charged particle found in the cloud
around the nucleus.
Why do scientists create models to describe
atoms?
A. They are too small to see.
B. They are too complex so we can’t understand
what they would look like.
C. They haven’t yet determined if they are real.
D. They do not know what they are made of.
What statement best describes Thomson’s
model of the atom.
A. A ball of positive charge with negative
charges scattered throughout.
B. A cloud of negative electrons surrounding a
positive nucleus.
C. A cloud of positive electrons surrounding a
negative nucleus.
D. Solid, indivisible spheres.
What statement best describes the results of
Rutherford’s experiment?
A. A beam of particles bent towards the positively
charged plate.
B. Atom’s emitted light with different wavelengths
when heated.
C. Most of the alpha particles went straight
through the gold foil but a few were deflected at
large angles.
D. Most of the alpha particles went straight
through the gold foil but some were slightly
deflected.
Based on his experiments, what did Rutherford
infer about the atom.
A. The atom consists of tiny electrons scattered
throughout a ball of positive charge.
B. The atom’s positive charge is clustered in a
tiny area in the center of an atom.
C. Electrons have very little mass.
D. Electrons orbit the nucleus like planets
around the sun.
What statement best describes Bohr’s model of
the atom?
A. Electrons orbit the nucleus in specific energy
levels.
B. Protons orbit the nucleus in specific energy
levels.
C. The nucleus contains both protons and
neutrons.
D. We need to use probability to predict where
an electron will be located.
What is an isotope?
A. Atoms of the same element with different
numbers of electrons.
B. Atoms of the same element with different
numbers of neutrons.
C. Atoms of the same element with different
numbers of protons.
D. Atoms of the same element with different
numbers of electrons and neutrons.
Why are atoms neutral?
A. They have neutrons in the nucleus.
B. The number of protons is equal to the
number of neutrons.
C. The number of protons is equal to the
number of electrons.
D. There are always more neutrons than
protons.
What does the mass number of an atom tell us?
A.
B.
C.
D.
Number of protons.
Number of neutrons.
Total number of protons and neutrons.
Total number of protons and electrons.
What is the atomic number?
A. The number of protons in an atom.
B. The number of neutrons in an atom.
C. The total number of protons and neutrons in
the atom.
D. The number of electrons or neutrons in an
atom.
What do scientists currently believe about
electrons in an atom.
A. They move predictably so we will someday
be able to locate them precisely.
B. We can only use probability to predict where
electrons will most likely be.
C. They move in perfect circles around the
nucleus.
D. Electrons never can move from one energy
level to another.
How is atomic mass of an element determined?
A. The sum of the protons and neutrons in an
atom.
B. By the atomic mass of the most abundant
isotope.
C. The weighted average of all the isotopes of
an element.
D. Average of the atomic masses of the
isotopes.
What specific isotope was used as a standard
when assigning masses to the elements?
A.
B.
C.
D.
Hydrogen-1
Helium-4
Carbon-12
Oxygen-16
What particle(s) have a relative mass of about 1
amu?
A.
B.
C.
D.
E.
F.
Proton
Neutron
Electron
Proton and electron
Proton and neutron
Neutron and electron
What particle did Chadwick discover?
A. Proton
B. Neutron
C. Electron
What particle(s) are located in the nucleus?
A.
B.
C.
D.
E.
F.
Proton
Neutron
Electron
Proton and electron
Proton and neutron
Neutron and electron
What scientist developed the model of the atom
shown?
A.
B.
C.
D.
E.
Dalton
Thomson
Rutherford
Bohr
deBroglie, Heisenburg, & Schrodinger
(Electron Cloud Model)
What scientist developed the model of the atom
shown?
A.
B.
C.
D.
E.
Dalton
Thomson
Rutherford
Bohr
deBroglie, Heisenburg, & Schrodinger
(Electron Cloud Model)
What scientist developed the model of the atom
shown?
A.
B.
C.
D.
E.
Dalton
Thomson
Rutherford
Bohr
deBroglie, Heisenburg, & Schrodinger
(Electron Cloud Model)
What scientist developed the model of the atom
shown?
A.
B.
C.
D.
E.
Dalton
Thomson
Rutherford
Bohr
deBroglie, Heisenburg, & Schrodinger
(Electron Cloud Model)
What scientist developed the model of the atom
shown?
A.
B.
C.
D.
E.
Dalton
Thomson
Rutherford
Bohr
deBroglie, Heisenburg, & Schrodinger
(Electron Cloud Model)