To draw the Lewis structure for CH5N (which is methanamine or methylamine), we start by determining the number of valence electrons. Carbon (C) has 4 valence electrons, hydrogen (H) has 1 valence electron, and nitrogen (N) has 5 valence electrons. So, the total number of valence electrons in CH5N is:
- 1 Carbon: 4 electrons
- 1 Nitrogen: 5 electrons
- 5 Hydrogens: 5 electrons (1 x 5)
- Total: 4 + 5 + 5 = 14 electrons
Next, we arrange the atoms. Carbon is usually the central atom in organic compounds, so we place carbon in the center. It will be bonded to three hydrogen atoms and one nitrogen atom. Nitrogen, which also can bond with three groups, will have one hydrogen attached to it.
The Lewis structure can be drawn as:
Now, let’s count the lone pairs. In this molecule, the carbon and nitrogen atoms form bonds with other atoms, thus:
- Carbon does not have any lone pairs. It is forming four bonds.
- Nitrogen has one lone pair, as it forms three bonds (one with carbon and two with hydrogen).
- All the hydrogen atoms have no lone pairs since they only have one bond each.
In conclusion, CH5N has one lone pair of electrons located on the nitrogen atom.