Question

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• row 1 : hcn: the problem atom(s) are incorrect.

decide whether these proposed lewis structures are reasonable.
proposed lewis structure is the proposed lewis structure reasonable?
yes.
no, it has the wrong number of valence electrons.
the correct number is:
no, it has the right number of valence electrons but doesnt satisfy the octet rule.
the symbols of the problem atoms are:* c, n

Explanation:

Step1: Calculate valence electrons

H has 1 valence electron, C has 4, N has 5. Total valence electrons: \(1 + 4+5=10\).

Step2: Analyze octet rule

In the given structure \(H - C = N\), C has 6 electrons (2 from single bond and 4 from double bond), N has 7 electrons (4 from double bond and 3 as lone pairs). Octet rule (8 - electron rule for C and N) is not satisfied.

Answer:

No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: \(C, N\)