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Chapter 4: Atomic Structure Flashcards | StudBud
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Chapter 4: Atomic Structure
Chapter 4: Atomic Structure
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Questions regarding the atom, atomic history and isotopes.
Flashcards
18 cards
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Questions
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Answers
1
How many neutrons are there in Carbon-14?
14
6
12
8
2
Which two scientists believed the atom was indivisible?
Democritus and Millikan
Democritus and Thomson
Democritus and Rutherford
Democritus and Dalton
3
Isotopes have the same number of _____, but a different number of ______.
neutrons; electrons
protons; neutrons
electrons; protons
neutrons; protons
4
Which scientist and discovery are incorrectly matched below?
Thomson- proton
Chadwick- neutron
Rutherford- nucleus
Millikan- mass and charge of electron
5
What discovery and experiment/device below are incorrectly matched?
Gold Foil Experiment- nucleus
Cathode Ray Tube- electron
All are correctly matched
Oil Drop Experiment- proton
6
Find the average atomic mass: Copper-63 = 69.09%; Copper-65 = 30.91%
63.14 amu
64.12 amu
64.59 amu
63.62 amu
7
Find the number of moles in 92.5 grams of nickel.
0.75
2.65
1.15
1.58
8
What element has an atom with 26 neutrons and a mass number of 48?
Cadmium
Tin
Titanium
Iron
9
Opposite charges ______, while like charges ______.
repel, repel
repel, attract
attract, repel
attract, attract
10
Calculate the mass, in grams, of 3.24 x 10
22
atoms of iron.
3.01
9.64 x 1022
1.81 x 1024
1.85
11
Who first suggested the existence of the atom in 400 BC and believed it was indivisible?
Dalton
Millikan
Democritus
Chadwick
12
Which subatomic particle has the same mass as a proton?
electron
neutron
13
Which model of the atom and description are incorrectly matched?
Nuclear Model- nucleus in center with protons outside
QMM- electrons described in terms of probability
Planetary Model- electrons orbit the nucleus
Plum Pudding Model- positive sphere with electrons scattered about
14
Reactant #1 = 3g, Reactant #2 = 5g → Product #1 = 6g, so Product #2 = ?
14 grams
2 grams
4 grams
8 grams
15
The net charge of an atom is _______.
neutral
positive
negative
16
Who established the first atomic theory that was supported by scientific proof?
Rutherford
Dalton
Democritus
Goldstein
17
Which statement below regarding the nucleus is incorrect?
It contains protons and neutrons.
It contains the majority of the atom's mass.
It is negatively charged.
It is extremely small and very dense.
18
Name the smallest particle of an element that retains the chemical properties of that element.
nucleus
atom
proton
molecule
