Question

decide whether these proposed lewis structures are reasonable.
proposed lewis structure is the proposed lewis structure reasonable?
h - c ≡ c :^-
yes.
no, it has the wrong number of valence electrons.
the correct number is:
no, it has the right number of valence electrons but doesn’t satisfy the octet rule.
the symbols of the problem atoms are: *
:cl = o:^-
yes.
no, it has the wrong number of valence electrons.
the correct number is:
no, it has the right number of valence electrons but doesn’t satisfy the octet rule.
the symbols of the problem atoms are: *
h - h - o - h^+
yes.
no, it has the wrong number of valence electrons.
the correct number is:
no, it has the right number of valence electrons but doesn’t satisfy the octet rule.
the symbols of the problem atoms are: *

• if two or more atoms of the same element don’t satisfy the octet rule, just enter the chemical symbol as many times as necessary. for example, if two oxygen atoms don’t satisfy the octet rule, enter o.o

Explanation:

Step1: Calculate valence - electrons for $[H - C\equiv C:]^{-}$

Hydrogen has 1 valence electron, and carbon has 4 valence electrons. The ion has a negative charge of 1. So the total number of valence electrons should be $1+(4\times2)+ 1=10$. The given structure has 8 valence electrons.

Step2: Calculate valence - electrons for $[:\ddot{Cl}=\ddot{O}:]^{-}$

Chlorine has 7 valence electrons and oxygen has 6 valence electrons. The ion has a negative charge of 1. So the total number of valence electrons is $7 + 6+1 = 18$. The given structure has 16 valence electrons.

Step3: Calculate valence - electrons for $[H - H - \ddot{O}-H]^{+}$

Hydrogen has 1 valence electron and oxygen has 6 valence electrons. The ion has a positive charge of 1. So the total number of valence electrons is $(1\times3)+6 - 1=8$. The given structure has 10 valence electrons.

Answer:

1. For $[H - C\equiv C:]^{-}$:

• No, it has the wrong number of valence electrons. The correct number is 10.

1. For $[:\ddot{Cl}=\ddot{O}:]^{-}$:

• No, it has the wrong number of valence electrons. The correct number is 18.

1. For $[H - H - \ddot{O}-H]^{+}$:

• No, it has the wrong number of valence electrons. The correct number is 8.