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Pearson Chemistry Chapter 4: Atomic Theory & Structure Flashcards | StudBud
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Pearson Chemistry Chapter 4: Atomic Theory & Structure
Pearson Chemistry Chapter 4: Atomic Theory & Structure
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1
Democritus theorized that atoms could not be
created
divided
destroyed
all of these
2
What is the mass number for this element?
1
1.008
H
All of these
3
The nucleus of an atom is...
made of electrons and protons.
positively charged and has more protons than neutrons.
the central core.
4
What is the atomic number of this element
65.39
30
35.39
Zn
5
The first person to propose atomic theory was
Darwin
Sophicles
Dalton
Democritus
6
The atomic mass of an element is dependent on the...
mass of each electron in that element.
mass of each isotope of that element.
mass and relative abundance of each isotope of that element.
7
Electrons were discovered by
John Dalton
Democritus
JJ Thompson
Earnest Rutherford
8
The smallest particle of an element that retains all the properties of that element
atom
neutron
matter
proton
9
The subatomic particle with a positive charge
all of these
neutron
proton
electron
10
Dalton proposed...
atoms of the same element are identical.
All of these.
all elements are composed of atoms.
atoms are never changed into another atom.
11
The atomic number tells you
the number of protons
the number of electrons
neither of these
both of these
12
How many protons does this element have?
35.39
30
1,903
65.39
13
What is the symbol for this element
30
65.39
Zn
Zinc
14
An isotope has ______________ number of protons and ____________ number of neutrons
the same; a different
a different; the same
the same; the same
a different; a different
15
Atomic mass is the weighted mass of
the isotopes of an element
the neutrons of an element
none of these
the protons of an element
16
Which of the following equals one atomic mass unit?
1/12 the mass of one carbon-12 atom
The mass of one electron.
The mass of one helium-4 atom.
17
The subatomic particle with no charge
electron
proton
neutron
none of these
18
The subatomic particle with a negative charge
electron
megatron
proton
neutron
19
This person is credited with proposing an atomic theory that lead to the one we have today
Aristotle
Democritus
Darwin
Dalton
20
How many protons are in this element?
12
6
12.011
0.011
21
Changing the number of neutrons has which effect on the overall charge of the atom?
Makes it positve
Makes it radioactive
Makes it negative
causes no change
22
How many electrons does this element have?
0.008
1.008
1
2
23
An element's position on the periodic table is determined by its
symbol
name
date of discovery
atomic number
24
The two letters in each box on the periodic table are each element's
Initials
Symbol
Classification
Name
