Question

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 the number of valence electrons

• Carbon (\(C\)) has \(4\) valence electrons.
• Oxygen (\(O\)) has \(6\) valence electrons.
• Hydrogen (\(H\)) has \(1\) valence electron.
• There is \(1\) \(C\) atom, \(1\) \(O\) atom and \(2\) \(H\) atoms in the molecule.
• The total number of valence electrons \(=4 + 6+2\times1=12\).

Step2: Check the octet rule

• The octet rule states that atoms (except \(H\)) tend to have \(8\) electrons in their valence shell.
• For \(H\), it follows the duet rule ( \(2\) electrons).
• In the given structure, \(H\) has \(2\) electrons (satisfies duet rule).
• \(C\) has \(8\) electrons ( \(2\) from each single bond with \(H\) and \(4\) from the double bond with \(O\)).
• \(O\) has \(8\) electrons ( \(4\) as lone pairs and \(4\) from the double bond with \(C\)).

Answer:

Yes.