In: Chemistry
QUESTION 1
Of the quantum numbers n, l, ml, and ms, which is the spin quantum number?
ml |
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n |
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l |
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ms |
1 points
QUESTION 2
Valence electrons are the outer electrons of an atom.
True
False
1 points
QUESTION 3
What type of bond is between the two carbon atoms in the molecule ethane (C2H6)?
Double |
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Single |
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Triple |
1 points
QUESTION 4
A molecule has a carbon atom that is best described by sp3 hybridization. Which bond angles (in degrees) come closest to describing the carbon?
180 |
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109.5 |
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120 |
1 points
QUESTION 5
Atoms that obey the octet rule have how many valence electrons?
Eighteen |
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Eight |
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Six |
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Three |
1 points
QUESTION 6
A molecule has a carbon atom that is best described by sp hybridization. How many other atoms are connected to this carbon?
Four |
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Three |
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Two |
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One |
1 points
QUESTION 7
The electron configuration, 1s22s22p6 is correct for which of the following atoms.
Li |
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Ne |
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Ar |
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O |
1 points
QUESTION 8
Choose the answer that best completes the sentence: In molecular orbital theory, a single bond consists of ______.
a pi molecular orbital |
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one sigma and two pi molecular orbitals |
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one sigma and one pi molecular orbital |
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a sigma molecular orbital |
1 points
QUESTION 9
The compound N2 contains only this kind of bond.
triple |
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single |
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double |
1 points
QUESTION 10
What is the maximum number of electrons that can be contained in the 4s orbitals?
10 |
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2 |
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6 |
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14 |
Question 1 ) the spin quantum number is represented by ms
n = principle quantum number
l = azimuthal quantum number
ml = magnetic quantum number
2) true: valence electrons are the electrons present in the outer most shell of an atom
For example
sodium : 1s2 2s2 2p6 3s1
So here the outer most shell is n= 3
the valence electrons are= 01
3) ethane (C2H6) is a saturated compound and consists of only sigma bonds , there is no pi bond
Hence single bond is present
4) the bond angle for tetrahedral arrangement is : 109.5 (sp3)
the bond angle 180 is for linear arrangement (sp)
120 is for trigonal planar (sp2)
5) the atoms which obey octet (8) rule have 8 electrons in their outermost shell
example : argon : 1s2, 2s2 2p6
6) sp hybridisation means that the carbon is triple bonded with one carbon
the total valency of carbon = 4
so if it is making three bond with other carbon then there is only one other atom attached to it
So total atoms= 2
7)The electron configuration, 1s22s22p6
Total number of electrons = 10
the neutral element with 10 electrons will be argon (Ar)
8) In molecular orbital theory, a single bond consists of : only sigma bond
sigma molecular orbital
9) compound N2 is formed from two nitrogen atoms which have triple bond (1 sigma bond and 2 pi bond)
10) the maximum electrons in any s orbitals = 2
so for 4s also it is = 2