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SCH4U - Unit 2: Structures and Properties of Matter Flashcards | StudBud
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SCH4U - Unit 2: Structures and Properties of Matter
SCH4U - Unit 2: Structures and Properties of Matter
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Unit review
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Questions
30
Answers
1
The orbital shape is determined by what quantum number?
ml
ms
n
l
2
The proper order of increasing energy sublevels is _____.
4s, 3d, 4p
3d, 3p, 4s
3d, 4p, 4s
3d, 4s, 4p
3
A pi bond...
is the overlap of s, p and f orbitals
is often an unhybridized orbital engaging in overlap
is the end to end overlap of p orbitals
is the same as a sigma bond
4
Which of the following compounds would have the lowest melting point?
potassium flouride
graphite
diphosphorous pentoxide
copper
5
How many electrons are there in the
third
shell of the atom with atomic number
23
?
8
11
3
10
6
Which of the following molecules has no net dipole?
H2O
NCl3
PCl5
ClF5
7
ms represents the....
magnetic spin
spin orientation
size
shape
8
Which of the following is the correct order for electrons filling in orbitals?
1s, 2s, 2p, 2d
3p, 4s, 3d, 5s
2p, 3s, 3p, 3d
3s, 3p, 4s, 3d
9
What does the Heisenberg Uncertainty Principle state?
No two electrons can have the same set of quantum numbers
Electrons behave more like standing waves than planets
If you know the speed of an electron you can't know position
I am the one who knocks
10
l=0 is an s orbital, but l=1 is a ...
f
p
s
d
11
The Valence bond theory states that...
moving electrons between energy levels
the overlap of electrons
atomic orbitals overlap forming a new orbital
hybridization
12
The values of l depend on the value of n. They are positive integers from ...
1 to (n-1)
0 to (n+1)
1 to (+)
0 to (n-1)
13
A sigma bond ...
is the parallel overlap of p orbitals
only exists in molecules with single bonds
represents a bond between two carbon atoms in ethene
is the parallel overlap of s and p orbitals
14
Which of the following produces a tetrahedral molecule?
NaCl
SiCl4
HBr
SO2
15
VSEPR means...
valence size electron pair repulsion
vector shape electron pairs
valence shell electron pair repulsion
Valence electron pair repulsion theory
16
Which answer describes the aufbau principle?
fill the energy levels starting bottom up
start top to bottom
an orbital can only have three electrons
an orbital can only have two electron
17
The following molecule has which molecular geometry?
Octahedral
Square planar
Square pyramidal
Trigonal bipyramidal
18
If “
n
” represents the number of any energy level, how many
orbitals
are in that energy level?
n2
2n
2n2
n
19
5 bonded atoms and 1 lone pair is what type of electron geometry
tetrahedral
trigonal bipyramid
bent
octahedral
20
ml represents what?
the shape of the orbital
electron density
the orientation of the orbital in space
the shell of the orbital
21
What type of orbital is shown in the image?
p
s
s
f
22
The hybridization of CH4 is ...
sp2
sp3
sp
sp3d
23
Predict the geometry of BCl3
trigonal planar
T-shape
tetrahedral
linear
24
The metallic bonding model explains which of the following properties?
conductivity
boiling point
viscosity
melting point
25
True or False: Each element would emit the same line spectra?
False
True
26
The principle quantum number, n describes what?
spin
the shell, energy level
n-1
orbitals
27
Which electron configuration represents an atom in an strong>excited state?
1s22s22p63s23p64s24p1
1s22s22p6
1s22s22p63s23p64s23d1
1s22s22p63s1
28
what kind of orbital is 2s?
l=1
p orbital
l=0
s orbital
29
John Dalton's model of the atom described matter as small....
an enigma
Dalton?
indivisible spheres
porous spheres
30
according to the pauli exclusion principle...
you must fill the energy levels starting bottom up
start top to bottom
an orbital can only have two electrons
an orbital can only have three electrons
