What is the molecular geometry of a nitrogen molecule, #"N"_2# ?
Start by calculating how many valence electrons you'd get for a molecule of nitrogen gas,
Nitrogen is located in period 2, group 15 of the periodic table, which tells you that it has
Another important thing to realize about the fact that nitrogen has
This tells you that in order for both nitrogen atoms to have a complete octet, each must share three electrons with the other.
Therefore, you must draw a triple bond between the two nitrogen atoms. This will account for
Remember, a region of electron density is
- a single, double, or triple bond - they all count as one region of electron density
- a lone pair of electrons
So, pick one of the two nitrogen atoms and count how many regions of electron density surround it - this is called the steric number.
In this case, one triple bond and one lone pair will amount to two regions of electron density. This means that the atoms have a steric number equal to
According to VSEPR Theory, this molecule falls into the
Therefore, the molecular geometry for this molecule will be linear, with a bond angle of about