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WorksheetsPhysical Science Ch. 3
Total questions: 25
Worksheet time: 13mins
What did Democritus suggest about matter?
That matter existed in the form of very small, indivisible particles
That matter could be subdivided an unlimited number of times.
That matter was continuous.
The law of electrostatic charges states that (SELECT ALL that apply)
opposite electric charges attract each other. & like electric charges repel each other.
Most of an atom consists of empty space.
J. J. Thomson discovered the existence of what?
atom
electron
neutron
What did the experiments involve that led to the discovery of the nucleus?
alpha particles and gold foil
the chemical reactions of gases
Crookes tubes and cathode rays
the emission spectrum
Which of the following is NOT a reason that the Bohr model is still in widespread use today?
It is fairly simple and easy to understand.
It remains useful for showing how chemical bonding works.
It is still the most workable model to date.
It represents energy levels in a way that is easier to visualize than more recent models.
Carbon-14 is different from carbon-12 in that it has a different number of
electrons
neutrons
protons
Which of the following is not a way that an ion can be formed?
An atom can gain extra electrons.
An atom can lose electrons.
An atom can lose a neutron.
John Dalton thought that atoms are indivisible and cannot be destroyed
True
False
Most of an atom consists of empty space.
True
False
Quantum mechanics deals with the behavior of _______ and _________ at the atomic and subatomic levels.
matter and energy
heat and cold
density and volume
The quantum-mechanical model is the primary model used by scientists __________.
today
in the old days
believed that electrons move through spherical regions located a fixed distance from the nucleus
Niels Bohr
John Dalton
J. J. Thomson
first suggested that elements are made of atoms and that the atoms of an element are all alike
Ernest Rutherford
John Dalton
thought of indivisible “atomos”
Ernest Rutherford
Democritus
r F 16. believed that electrons move through sph
developed the nuclear model
Ernest Rutherford
Hantaro Nagaoka
J. J. Thomson
developed the plum pudding model
Democritus
Niels Bohr
J. J. Thomson
developed the Saturnian model
Hantaro Nagaoka
John Dalton
Ernest Rutherford
Identify the description as referring to a proton (P), electron (E), or neutron (N).
This subatomic particle is found in the nucleus and has no electrical charge
P
E
N
Identify the description as referring to a proton (P), electron (E), or neutron (N).
This subatomic particle has a charge of +1e.
P
E
N
Identify the description as referring to a proton (P), electron (E), or neutron (N).
This subatomic particle is the most massive of these three subatomic particles.
P
E
N
Identify the description as referring to a proton (P), electron (E), or neutron (N).
The quantity of this subatomic particle in an atom of a substance determines the atom’s identity
P
E
N
Identify the description as referring to a proton (P), electron (E), or neutron (N).
This subatomic particle is the smallest of these three subatomic particles.
P
E
N
The unique number of protons in the atoms of an element is that element’s _______.
atomic number
atomic mass
ion
isotopes
Atoms of the same element with differing numbers of neutrons are called ________.
Atomic mass
Isotopes
ion
An ion that has more protons than electrons is called a(n) ________.
ion
cation
isotopes
