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:*

Explanation:

Step1: Calculate valence electrons

Valence electrons of \(H = 1\), \(C=4\), \(N = 5\). Total valence electrons \(=1 + 4+5=10\).

Step2: Check octet rule

In \(H - C=N\), \(H\) has \(2\) electrons (satisfied), \(C\) has \(6\) electrons (violates octet rule as it should have \(8\)), \(N\) has \(7\) electrons (violates octet rule as it should have \(8\)).

Answer:

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