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