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Unit 2 - Atomic Structure/Periodic Table/Electrons in Atoms Review Flashcards | StudBud
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Unit 2 - Atomic Structure/Periodic Table/Electrons in Atoms Review
Unit 2 - Atomic Structure/Periodic Table/Electrons in Atoms Review
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A review of Unit 2 material
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
Al-27 has how many neutrons?
14
26.98
27
13
2
Whose model of the atom is represented here?
Bohr
Rutherford
Dalton
Thomson
3
Two isotopes of an element have all of the following
in common,
EXCEPT
. . .
atomic number
atomic mass
number of protons
chemical properties
4
The graphic is representative of which electron configuration guiding principle?
Hund's Rule
Pauli Exclusion Principle
Aufbau Principle
5
Who is responsible for the following model of an atom?
Thomson
Democritus
Dalton
Bohr
6
On the periodic table, the ___________ are located below the main portion of the table.
noble gases
inner transition metals
alkali metals
halogens
7
Which is likely the most common isotope for magnesium?
Mg-24
no way to know
Mg-24.305
Mg-25
8
Two or more atoms with equal # of protons, but different # of neutrons are called _______.
atoms
isotopes
elements
ions
9
Which is the correct electron configuration for calcium?
none of these
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2
1s2 2s2 2p6 3s2 3p6 3d2
10
The ________ was discovered as a result of the cathode ray tube experiment
proton
neutron
atom
electron
11
Most of the mass of the atom is in the _________.
electron cloud
electrons
nucleus
isotopes
12
In the Gold Foil Experiment all of the following were conclusions drawn
EXCEPT
. . .
the nucleus contained a positive charge
the atom is mostly empty space
the nucleus was tiny compared to the size of the atom
the neutrons were located in the nucleus and had no charge
13
When calculating the average atomic mass for an element do all of the following except . . .
multiply the mass of each isotope x its fractional abundance
perform a weighted average calculation
add up the masses and divide by how many isotopes there are
change the % abundance into decimal form
14
The smallest particle of an element that retains the properties of that element is the:
proton
atom
electron
subatomic particle
15
What is the
highest occupied energy level
for an element with the given e- configuration?
4
3
1
2
16
Most of the volume of the atom is taken up by the _____________.
nucleus
neutrons
electron cloud
protons
17
In the following symbol, which letter represents the atomic number?
C
None of them
B
A
18
Which four words might help you recall the key ideas in Dalton's Atomic Theory?
isotopes, similarities, differences, masses
indivisible, protons, neutrons, electrons
indivisible, identical, compounds, reactions
nucleus, massive, positive, tiny
19
The philosopher who viewed matter as being made up of
indivisible
particles.
Thomson
Democritus
Rutherford
Dalton
20
Given the graphic, what is the proper number of p, n, and e, respectively, for the isotope?
35, 80, -1
35, 80, 34
35, 45, 36
35, 45, 34
