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Beck- Atomic Structure & Theory
Beck- Atomic Structure & Theory
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This quiz reviews the basic structure and theory of the atom - protons, neutrons, and electrons
Flashcards
24 cards
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Questions
24
Answers
1
What is the atomic number of bismuth?
15
5
83
209
2
Where are electrons located?
In the nucleus
In orbital shells around the nucleus
3
The gold foil experiment found that most of an atom is made up of ...
nucleus
electrons
empty space
protons
4
What is the mass of a neutron?
about 1/1800th an amu
0 amu.
2/3 amu.
1 amu.
5
What is the mass of a proton?
1 amu
0 amu
about 1/1800th an amu
2/3 amu
6
Where are neutrons located?
In orbital shells around the nucleus.
In the nucleus.
7
gold-197 and gold-198 are best described as...
atoms
ions
positive
isotopes
8
An atom of sodium has 11 protons, 13 neutrons, and 11 electrons. What is its mass?
24
23
35
11
9
An atom of what element has 16 electrons?
magnesium
selenium
oxygen
sulfur
10
Who is credited with discovering the electron?
Rutherford
Aristotle
Chadwick
Thompson
11
Changing the number of neutrons in an atom changes its...
isotope type.
charge.
atom type.
element type.
12
Who is credited with discovering the neutron?
Chadwick
Millikan
Rutherford
Thompson
13
What is mass number?
The number of neutrons in an element.
The number of protons in an element
The number of protons and neutrons.
The number of protons and electrons.
14
Lithium-5 isotope (atomic mass 5) has how many neutrons?
0
1
3
2
15
What element has 38 protons?
strontium
hassium
argon
calcium
16
When there are the same number of protons and electrons in an atom, that atom is a...
neutral atom.
negative ion.
unstable isotope.
positive ion.
17
How many electrons does a neutral carbon atom have?
14
6
0
2
18
14% of element Q has a mass of 141amu, the remaining 86% = 143amu. Average atomic mass?
141.28amu
14.272amu
14,272amu
142.72amu
19
How many neutrons does germanium-74 have?
74
42
32
41
20
Which part of Dalton's Atomic Theory has been disproven?
all atoms of an element are identical
all matter is made up of atoms
reactions rearrange atoms
atoms of elements combine to form compounds
21
Which of these would change an atom into a different element?
Change the number of neutrons.
Change the number of electrons.
Change the number of protons.
22
Where are protons located?
In orbital shells around the nucleus.
In the nucleus.
23
Which values will always be the same for all atoms of an element?
protons and electrons
protons and atomic #
neutrons and mass
protons and neutrons
24
Who is credited with discovering the proton?
Chadwick
Thompson
Millikan
Rutherford
