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Early Atomic Theory Flashcards | StudBud
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Early Atomic Theory
Early Atomic Theory
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1
This subatomic particle is responsible for an element's
reactivity
.
proton
neutron
nucleus
electron
2
Protons are __ charged and found __ .
negative; outside the nucleus
neutral; inside the nucleus
positively; inside the nucleus
positively; outside the nucleus
3
Who first proposed a theory of the atom based on the scientific method?
Rutherford
Dalton
Goldstein
Democritus
4
Which of the following is NOT part of Dalton’s Atomic Theory?
Mass is conserved in chemical reactions
Atoms are rearranged in chemical reactions
Matter is composed of atoms
Compounds are combinations of two or more different atoms
5
This model of the atom is attributed to which scientist?
Chadwick
Thomson
Dalton
Rutherford
6
In the gold foil experiment, most of the particles fired at the gold...
were absorbed by the foil
went straight through
hit the nucleus
bounced back
7
What part of the atom has the smallest mass?
proton
nucleus
electron
neutron
8
This subatomic particle is responsible for keeping the nucleus together (increasing stability).
electron
proton
neutron
nucleus
9
Which scientist suggested that most of the atom is empty space?
Thomson
Dalton
Chadwick
Rutherford
10
The avg. atomic mass of Chlorine is 35.45 amu. Which isotope, Chlorine-35 or Chlorine-37 is more abundant?
They are both equally abundant
Chlorine-37
Chlorine-35
11
In the "Plum Pudding" or "Chocolate Chip Cookie" model, what do the chocolate chips represent?
protons
neutrons
electrons
nucleus
12
This model of the atom is attributed to what scientist?
Thomson
Chadwick
Goldstein
Dalton
13
Experiments with cathode rays led to the discovery of the __.
proton
neutron
electron
nucleus
14
What does the number 84 in the symbol Krypton-84 represent?
mass number
atomic number
number of neutrons
number of protons
15
Which of the following correctly matches the subatomic particle with its charge?
p = - , n = neutral , e = +
p = + , n = - , e = -
p = + , n = neutral , e = -
p = + , n = - , e = neutral
16
The gold foil experiment led to the discovery of the __.
protons
neutrons
nucleus
electrons
17
This model of the atom is attributed to what scientist?
Dalton
Goldstein
Thomson
Rutherford
18
Compared to the entire atom, the nucleus is
smaller and contains little of the atom's mass
larger and contains little of the atom's mass
larger and contains most of the atom's mass
smaller and contains most of the atom's mass
19
This subatomic particle is responsible for determining the
identity
of the atom.
proton
nucleus
electron
neutron
