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Atomic Structure/Theory test review Flashcards | StudBud
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Atomic Structure/Theory test review
Atomic Structure/Theory test review
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Atomic theory, average atomic mass, and atomic structure questions
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1
Which of the following is not part of John Dalton's atomic theory
Atoms contain subatomic particles.
All atoms of the same element have the same mass.
A compound contains atoms of more than one element.
All elements are composed of atoms.
2
To find the number of neutrons in an atom, you would subtract
Mass number from atomic number.
Atomic number from mass number.
Atomic number from electron number.
Isotope number from atomic number.
3
When finding average atomic mass, which of the following is how you convert a percent into a decimal?
Move the decimal two places to the right
Move the decimal two places to the left
Multiply the percent by 100
Divide the percent by 100
4
In Nuclear notation where is the atomic mass located when compared the the elements symbol?
Top right
Bottom right
Bottom left
Top left
5
In Rutherford's model of an atom, electrons move
like balls rolling down a hill.
like planets orbiting the Sun.
like beach balls on water waves.
like popcorn in a popcorn popper.
6
How are isotopes of the same element different from each other?
There is no difference in isotopes
The number of electrons
The number of neutrons
The number of protons
7
Which statement is TRUE about oxygen-17 and oxygen-18?
Their atoms have an identical mass.
They have the same mass number.
They are isotopes of oxygen.
They do not have the same number of protons.
8
In Nuclear notation where is the charge located when compared the the elements symbol?
Top right
Bottom right
Bottom left
Top left
9
Which of these is always equal to the element's atomic number?
Number of electrons
Number of neutrons
Number of protons
Number of nuclei
10
Which of the following is unique for any given element?
Number of neutrons
Mass of a neutron
Number of protons
Charge on the electrons
11
In Nuclear notation where is the atomic number located when compared the the elements symbol?
Bottom right
Top right
Top left
Bottom left
12
Which expression accurately compares the masses of neutrons and protons?
Mass of 1 neutron = mass of 1 electron
Mass of 1 electron = mass of 1 proton
Mass of 1 neutron = mass of 1 proton
Mass of 2000 neutron = mass of 1 proton
13
The number of protons in one atom of an element is that element's...
balanced charge
atomic number
isotope
mass number
14
Which sentence states what Rutherford concluded from the gold foil experiment?
An atoms negative charge is concentrated in it's nucleus
An atom's positive charge is concentrated in it's nucleus
Thomson's model of the atom was correct
The atom's positive charge is spread evenly about the atom.
15
J. J. Thomson's experiments provided evidence that an atom
has a positive charge.
contains negatively charged particles.
has a negative charge.
is the smallest particle of matter.
16
What subatomic particle has a negative charge?
Neutron
Electron
Alpha particle
Proton
17
Who provided evidence for the existence of a nucleus in an atom
J. J. Thomson
Ernest Rutherford
John Dalton
Democritus
18
Which statement about subatomic particles is TRUE?
An electron has far less mass than a proton or a neutron.
Electrons are found in the nucleus
Neutrons have no charge and no mass.
Protons, neutrons & electrons all have about the same mass.
19
Which scientist was responsible for the idea that atoms of two different elements aredifferent from each other.
Tony Stark
Rutherford
Dalton
Thomson
20
Which statement about subatomic particles is NOT true?
Neutrons have no charge.
Protons and neutrons have almost the same mass.
Protons and neutrons have the same charge.
Protons and electrons have opposite charges.
