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Atomic Theory and Structures Flashcards | StudBud
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Atomic Theory and Structures
Atomic Theory and Structures
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Learn the atomic theories and structures!
Flashcards
10 cards
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Practice quiz
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Questions
10
Answers
1
What is the smallest particle that exists in an atom?
Electron
Electron cloud
Neutron
Proton
2
An element has an atomic mass of 63.546. How many neutrons does it contain?
37
36
35
34
3
Why are atomic masses considered fractional in nature?
Because some elements have a fractional number of isotopes.
Because most of the elements exist as a mixture of isotopes.
Because chemistry is fun.
Because isotopes exist only in fractional amounts.
4
Which answer choice has the correctly matched charges for each particle?
Proton(-), Neutron(+), Electron(-)
Proton(-), Neutron(+), Electron(neutral)
Proton(+), Neutron(neutral), Electron(-)
Proton(neutral), Neutron(-), Electron(+)
5
Find average atomic mass of Lithium if 7.42% is
6
Li (6.015 amu) and 92.58% is
7
Li (7.016 amu).
6.941 amu
5.445 amu
7.213 amu
6.914 amu
6
Dalton's atomic theory states all atoms of a given element are identical in mass and properties
True
False
7
If Cobalt has an atomic number of 27, how many protons does it have?
29
27
30
26
8
A proton is approximately how many times heavier than an electron?
3000
1500
2000
4500
9
What experiment did Rutherford do to prove the existence of a positive, dense center in atoms?
Tin Foil Experiment
Neutron Dispersion Experiment
Gold Foil Experiment
Plum Pudding Experiment
10
Which answer choice correctly describes the structure of an atom?
Protons and neutrons in the nucleus. Electrons in orbit.
Neutrons, protons, and electrons inside the nucleus.
Protons and neutrons floating around the electron cloud.
Electrons and protons inside the nucleus.
