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Atomic Theory Review Flashcards | StudBud
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Atomic Theory Review
Atomic Theory Review
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Questions
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Answers
1
An atom containing 9 protons, 12 neutrons, and 10 electrons has a mass number of _____.
21
12
9
19
2
What are cathode rays?
beams of electrons
beams of protons
beams of neutrons
beams of alpha particles
3
Isotopes vary from one another by their number of _____________.
Neutrons
Electrons
Particles
Protons
4
Who was the first person to theorize the concept of an atom?
Aristotle
Democritus
Dalton
Thomson
5
What did Rutherford discover with his Gold Foil Experiment?
Atoms were indivisible.
The Law of Conservation of Mass
Atoms contain a central, positively charged nucleus.
Atoms were mostly made of positively charged material.
6
Bohr's model of the atom is called the _________________ model.
planetary
orbiting
atomic
surrounding
7
Whose experiment is this?
Chadwick
Dalton
Thomson
Rutherford
8
Who identified protons?
Rutherford
Bohr
Thomson
Chadwick
9
If an element has 7 protons and 10 electrons, that element must be _________.
a quark
neutral
an isotope
an ion
10
Who proposed the Nuclear Model of the atom?
Dalton
Chadwick
Rutherford
Bohr
11
Which part of Dalton's Atomic Theory has been disproved?
all atoms of the same element are identical
all matter is made up of atoms
reactions rearrange elements
atoms of elments combine to form compounds in whole number ratios
12
Who discovered the neutron?
Democritis
Chadwick
Rutherford
Bohr
13
In the gold foil experiment what was shot at the gold foil?
Alpha Particles
Gamma Particles
Neutrons
Electrons
14
What law allows us to decide if the two compounds listed below are the same or different?
Definite Composition
Avogadro's Law
Multiple Proportions
Conservation of Mass
15
Bohr placed electrons in set energy levels called ____________.
orbits
pathways
steps
locations
16
Elements are identified by their ___________.
Charge
Mass Number
Atomic Number
Happy smile
17
Now that we have completed unit 02, this cartoon is really funny! : )
True
False
18
Who proposed the Plum Pudding Model?
Thomson
Rutherford
Chadwick
Dalton
19
What would be the mass of water formed by the reaction of two grams of hydrogen with 16 grams of oxygen?
18 grams
2 grams
16 grams
14 grams
20
Which is an example of the law of multiple proportions?
CO and H2O
HCl and HNO3
CO and C2H4
NO2 and N2O
21
Who performed experiments with this to discover the e-?
Rutherford
Bohr
Schrodinger
Thomson
