Question

Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule | proposed Lewis structure | Is this a reasonable structure? If not, why not? OCl2 | : Cl — O — Cl : | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: BH2+ | [ H — B — H ]+ | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: PF4- | [ : F : | : F — P — F : | | : F : ]- | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.

          Decide whether the Lewis structure proposed for each molecule is reasonable or not.

molecule | proposed Lewis structure | Is this a reasonable structure? If not, why not?
OCl2 | : Cl — O — Cl : | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is: 
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are: 
BH2+ | [ H — B — H ]+ | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is: 
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are: 
PF4- | [ : F : | : F — P — F : | | : F : ]- | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is: 
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are: 
* If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.

Show more…

Decide whether the Lewis structure proposed for each molecule is reasonable or not.

molecule | proposed Lewis structure | Is this a reasonable structure? If not, why not?
OCl2 | : Cl — O — Cl : | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is:
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are:
BH2+ | [ H — B — H ]+ | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is:
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are:
PF4- | [ : F : | : F — P — F : | | : F : ]- | Yes, it's a reasonable structure.
No, the total number of valence electrons is wrong.
The correct number is:
No, some atoms have the wrong number of electrons around them.
The symbols of the problem atoms are:
* If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.

Added by Kimberly N.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Jennifer Hudspeth

11/30/2022

Step 1

Oxygen and both chlorine atoms have 8 electrons around them, satisfying the octet rule. ** Show more…

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Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule | proposed Lewis structure | Is this a reasonable structure? If not, why not? OCl2 | : Cl — O — Cl : | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: BH2+ | [ H — B — H ]+ | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: PF4- | [ : F : | : F — P — F : | | : F : ]- | Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.

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Transcript

00:01 Hi there.

00:02 In this question, we are looking at some lewis structures that have been suggested for these molecules, and we're in determining if they are correct.

00:10 So our first one is for o .c .l2.

00:13 When we look at what is drawn there, first thing we want to do is see if everything has an octet.

00:19 And chlorine has eight around it, oxygen has eight around it, and the other chlorine has eight around it.

00:25 So all three have the correct number of electrons.

00:30 They have an octet.

00:33 Let's see if we have the correct number of electrons.

00:34 Number of total electrons then.

00:37 Since they all have an octet, let's check the total number.

00:41 Well, oxygen is in group six of the periodic table, so it has six total valence electrons.

00:47 Each chlorine, being a halogen, has seven in group seven a there.

00:52 So that should be 20 valence electrons.

00:58 Let's count up what they have there.

01:00 They have two, four, six, eight, ten, twelve, 14, 16, 18, 20.

01:06 So we do have the correct number of valence electrons.

01:14 Since we've satisfied both of these requirements, the correct number of valence electrons, and each element having an octet, that means this would be a reasonable structure.

01:27 So yes, it is reasonable.

01:38 Okay, for our next one, our next one has some issues.

01:42 In that really it's something that doesn't exist, really.

01:50 Vh2 minus does, but vh2 plus doesn't really exist.

01:56 So as we look at this proposed structure, we see that hydrogen has two electrons, but boron only has four.

02:05 Boron is not stable with four.

02:07 Boron is stable with six, but it's not stable with four.

02:16 Boron is an exception, but it's a exception, but it's an exception that requires six electrons around it.

02:25 Borrelium is happy with four, but not boron.

02:29 But if we count the number of valence electrons here, there's three for the boron, plus two times one for each hydrogen, minus one for that positive charge, and that only gives us only four electrons to work with, which is what are shown here.

02:48 So the number of electrons are correct for this formula, and given this formula, the structure is the best thing you can draw, but boron does not have the correct number of electrons around it.

03:10 So i am going with the no.

03:15 Some atoms have the wrong number of electrons.

03:21 And again, that's a function of the formula...

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