Need to draw electron dot diagram showing the covalent bond
PCL3
We can't draw structures on the board but here is a web site that gives it plus instructions on how it is to be done.
(Broken Link Removed)
To draw an electron dot diagram for PCL3, you need to know the chemical formula and the Lewis structure of the molecule.
1. Determine the total number of valence electrons for each atom in the molecule:
- Phosphorus (P) is in Group 5, so it has 5 valence electrons.
- Chlorine (Cl) is in Group 7, so each chlorine atom has 7 valence electrons.
2. Calculate the total number of valence electrons in the molecule by adding up the valence electrons of each atom:
- For PCL3, phosphorus contributes 5 electrons, and three chlorine atoms contribute a total of 3 x 7 = 21 electrons. Thus, the total number of valence electrons is 5 + 21 = 26.
3. Determine the central atom:
- In PCL3, the central atom is phosphorus (P), as it is less electronegative than chlorine (Cl).
4. Distribute the remaining electrons to fill the valence shells of the atoms:
- Place a pair of electrons between the central atom (P) and each chlorine atom (Cl) to form a covalent bond. This accounts for 2 x 2 = 4 electrons.
- Distribute the remaining electrons around the atoms to satisfy the octet rule (except for hydrogen, which can only form 2 bonds).
The final electron dot diagram for PCL3 would look like this:
Cl
/
Cl-P-Cl
\
Cl
In this diagram, the dots represent valence electrons, and the lines represent covalent bonds. Phosphorus (P) has 3 lone pairs of electrons and forms 3 covalent bonds with chlorine (Cl).