The first is a ring called cyclopropane. It is also possible to draw three carbons in a line with a double bond. Both Lewis structures are correct for C3H6. After determining how many valence electrons there are in C3H6, place them around the central atom to complete the octets.

Electron Dot Structure of Propene:

Propene, also known as propylene, is an unsaturated hydrocarbon with the chemical formula C3H6. It consists of three carbon atoms bonded together with six hydrogen atoms. In the electron dot structure, we represent the valence electrons of each atom as dots around the atomic symbol. Here is the detailed explanation of the electron dot structure of propene:

Valence Electrons:
- Carbon (C) has 4 valence electrons.
- Hydrogen (H) has 1 valence electron.

Step 1: Determine the Total Number of Valence Electrons:
To determine the total number of valence electrons in propene, we add up the valence electrons of all the atoms in the molecule.

- Carbon (C): 3 atoms x 4 valence electrons = 12 valence electrons
- Hydrogen (H): 6 atoms x 1 valence electron = 6 valence electrons

Total valence electrons in propene = 12 + 6 = 18 valence electrons.

Step 2: Connect the Atoms:
In the electron dot structure, we represent the atoms by their atomic symbols and connect them with single bonds.

Propene consists of three carbon atoms connected in a chain. The middle carbon atom is double bonded to one of the other carbon atoms. Each carbon atom is also bonded to two hydrogen atoms.

Step 3: Distribute the Remaining Electrons:
After connecting the atoms with single bonds, we distribute the remaining valence electrons around the atoms.

- Carbon (C): Each carbon atom initially has 4 valence electrons. After forming a single bond with another carbon atom, each carbon atom has 3 valence electrons remaining.
- Hydrogen (H): Each hydrogen atom has 1 valence electron.

Step 4: Place the Remaining Electrons:
To complete the octets of the atoms and fulfill the octet rule (except for hydrogen), we place the remaining electrons as lone pairs.

- Carbon (C): Each carbon atom receives one additional electron to complete its octet.
- Hydrogen (H): Hydrogen atoms receive no additional electrons since they only require two electrons to complete their valence shells.

Step 5: Check if Octets are Complete:
After placing the remaining electrons and distributing them, we check if all the atoms have achieved an octet (except for hydrogen). If any atom does not have a complete octet, we can use lone pairs from neighboring atoms to form double or triple bonds.

In the case of propene, all the atoms have achieved an octet, and no double or triple bonds are required.

Final Electron Dot Structure of Propene:
The final electron dot structure of propene shows the three carbon atoms connected in a chain, with the middle carbon atom double bonded to one of the other carbon atoms. Each carbon atom is also bonded to two hydrogen atoms. The electron dots represent the valence electrons of each atom.

Example:
C C C
| | |
H H H
|
C

This representation shows the electron dot structure of propene, fulfilling the valence electron requirements of each atom while maintaining the overall charge neutrality of the molecule.