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svetlana [45]
3 years ago
5

Describe how NH3 and CF4 satisfies the octet for all atoms.

Chemistry
1 answer:
MariettaO [177]3 years ago
4 0
Let's start with ammonia (NH3)
A nitrogen atom has five valence electrons, and it wants a total of eight. It bonds with three hydrogen atoms, and "shares" one of its electrons with each hydrogen atom. The nitrogen atom now has six shared electrons and two unshared electrons, meaning the nitrogen atom now has eight. Hydrogen, on the other hand is special, as it only really wants two electrons in its outer shell, so it has a total of 2 shared electrons, and the octet or "Noble gas" rule is fulfilled, as hydrogen would then be like the nearest noble gas, helium.

For CF4, the explanation is much more simple. Each fluorine has seven outer electrons, so it wants to gain one more. Carbon has four electrons, and it wants to gain four. So, carbon shares one of each of its electrons with one of each fluorine's, making the carbon have eight electrons, and each fluorine has eight as well.
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Using the molecular orbital model to describe the bond- ing in F2????, F2, and F2????, predict the bond orders and the relative
masya89 [10]

Answer: F2 : bond order= 1.0

F2+: bond order = 1.5

F2- : bond order = 0.5

Explanation:

1. Starting with F2+

The configuration gives;

F2+ = 9F = 1S2.2S2.2P5

= 9F+ = 1S2.2S2.2P4 (this shows it gives out an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py1

The number of Electrons = (9*2) – 1 = 18 -1 = 17

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 7

Bond order = (10-7)/2 = 3/2 = 1.5

Number of unpaired electrons = 1

2. Starting with F2

The configuration gives;

F2 = 9F = 1S2.2S2.2P5

9F = 1S2.2S2.2P5 (this shows no loss of an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py2

The number of Electrons = (9*2) = 18 electrons

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 8

Bond order = (10-8)/2 = 2/2 = 1.0

Number of unpaired electrons = 0

3. Starting with F2-

The configuration gives;

F2- = 9F = 1S2.2S2.2P5

10F--= 1S2.2S2.2P6 (this shows an addition of an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py2 σ*2Pz

The number of Electrons = (9*2) + 1 = 19 electrons

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 9

Bond order = (10-9)/2 = 1/2 = 0.5

Number of unpaired electrons = 1

To get the order of bond as well as length, we know that;

Bond order directly proportional to 1/ Bond length

Therefore the Ascending Bond length = F2+ ˂ F2 ˂ F2-

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2 years ago
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Alexxx [7]

Answer:

Name : Magnesium Fluoride

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Explanation:

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3 years ago
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Answer:

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Explanation:

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A simple circuit consists of a battery to provide power, wires to carry the electrical power, and
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