# For which structure(s) does the electron-bearing carbon atom have a formal charge of zero?

1). For which structure(s) does the electron-bearing carbon atom have a formal charge of zero? 2). For which structure(s) is the net charge zero?

## General guidance

Concepts and reason
Formal charge explains the contribution of valence electron from each atom in a molecule. Formal charge of atom in the structure can be done using octet rule. Net charge is the sum of the formal charge of the atoms in the molecule.

Fundamentals

Formula for formal charge is given below Octet rule is the tendency of the atom to maintain eight electrons in the outermost shell. Net charge is the sum of the formal charge of the atoms in the molecule.

## Step-by-step

### Step 1 of 2

Part 1 The structure given below has the carbon atom with zero formal charge. Consider the given structure and find the formal charge of the carbon atom in the structure.

Part 1

Carbon has four valence electrons. Two unshared electrons in one lone pair. So the number of lone pairs of electron is 2, and two shared electrons in two carbon-hydrogen bond. So the number of covalent bonds is 2. Thus, the calculated formal charge on carbon is zero Carbon has four valence electrons. One unshared electron in one lone pair. So number of lone pair of electron is 1, and three shared electrons in two carbon-hydrogen bond and one carbon-carbon bond so number of covalent bond is 3. Thus, the calculated formal charge on carbon is zero

### Step 2 of 2

For both structures the net charge is zero. [Part 2] Part 2

Part 2

The calculated formal charge on hydrogen is zero. Because each hydrogen atom in this molecule is identical, so each hydrogen atom has the same formal charge of zero The calculated formal charge on hydrogen is zero. Because each hydrogen atom in this molecule is identical, so each hydrogen atom has the same formal charge of zero