VSEPR Formula

[Megan Purl 1E]

Can someone please explain the VSEPR formula? What does each letter in AXnEm stand for?

[Chris Pleman 3E]

A corresponds to the central atom, the X with its subscript symbol represents the number of bonded atoms, and the E and its subscript applies to the number of lone pairs.

[Nora 1F]

I just asked the same question and from what I understand now, this is how AXE notation works:

The A is the central atom.
The X is an atom that is directly attached to the central atom.
The subscript n is the number of atoms (bonded pairs) attached to the central atom.
The E is the a lone pair of electrons around the central atom.
The subscript m is the number of lone pairs on the central atom.