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Unit 3 Atomic Theory & Structure Flashcards | StudBud
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Unit 3 Atomic Theory & Structure
Unit 3 Atomic Theory & Structure
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A quiz to help review atomic theory and structure.
Flashcards
23 cards
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Practice quiz
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Questions
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Answers
1
In Ernest Rutherford's Gold Foil Experiment, what charge did the beam of particles have?
Negative
It was never mentioned.
No charge
Positive
2
According to Bohr's model, electrons move in ____________ around the nucleus.
random paths
wave-like patterns
electron clouds
orbits
3
Which of these statements is
false
about protons?
They have a mass of 0 amu.
They were discovered by Ernest Rutherford.
They are located in the nucleus.
They have a positive charge.
4
What is Rutherford's atomic model called?
The Billiard Ball Model
The Plum Pudding Model
The Planetary Model
The Nuclear Model
5
What is the atomic mass of a neutron?
0.998623 amu
0.5 amu
0 amu
1.00 amu
6
James Chadwick "discovered" the ________________.
photon
electron
proton
neutron
7
How many electrons does this isotope have?
53
1
19
18
8
Which of these particles affect an atom's stability?
neutron
photon
electron
proton
9
Democritus (and John Dalton) believed atoms were _____________________ particles.
empty
divisible
indivisible
large
10
Identify the theorist:
He suggested that electrons act as both waves and particles, like light.
James Chadwick
Erwin Schrödinger
Louis de Broglie
Ernest Rutherford
11
Which of these statements about the Quantum Mechanical Model is
false
?
Electrons do not have an exact location.
Electrons are low-energy particles.
Electrons can be bent or diffracted.
Electrons behave like waves.
12
What does the "9" represent?
Number of neutrons
Atomic number
Average atomic mass
Mass number
13
Isotopes have the same number of ____________, but have a different number of ____________.
neutrons; electrons
electrons; protons
neutrons; protons
protons; neutrons
14
J.J. Thomson used what experiment to discover electrons?
The Gold Foil experiment
The Cathode Ray Tube experiment
No expermient
A mathematical experiment
15
Which of these is
NOT
a way to represent an isotope?
189 F
Fluorine-18
F-18
Fluorine-9
16
Who coined the term "atomos"?
Democritus
Ernest Rutherford
J.J. Thomson
John Dalton
17
What does the "9" represent?
Mass number
Average atomic mass
Number of electrons
Atomic number
18
What is this model called and who proposed it?
The Nuclear Model; Rutherford
The Planetary Model; Bohr
The Plum Pudding Model; Dalton
The Plum Pudding Model; Thomson
19
This is the ___________________ model, and ___________________ developed it.
Plum Pudding; Thomson
Billiard Ball; Democritus & Rutherford
Billiard Ball; Democritus & Dalton
Billiard Ball; Schrödinger
20
What does the "16" represent?
Average atomic mass
Atomic number
Mass number
Number of neutrons
21
Rutherford "discovered" which of these atomic components?
The proton and nucleus
The electron and proton
The nucleus and electron
The electron
22
Atomic number represents the number of ______________ in an atom.
photons
electrons
neutrons
protons
23
Which of these components of John Dalton's atomic theory are
false
as of today?
Atoms combine in whole-number ratios to form compounds.
Atoms of the same element are identical.
Atoms are rearranged in chemical reactions
Atoms cannot be subdivided.
