Laverda SF said:
So what's an excited electron which is considered positive.
Electrons are always negatively charged Ron. Never positive.
A quick primer on particle physics ...
In classical particle physics, electrons orbit the nucleus of an atom to form a molecule. The orbits are considered to happen in several different levels, or distances from the nucleus. The closest orbit can contain 2 electrons, then next level 8 electrons, and so on. I forget the numbers for subsequent orbits, but they generally increase as they get further from the nucleus.
An electron that jumps from a low orbit to a higher one is considered to be "excited" because it has a higher energy level, but it's still negatively charged. The protons in the nucleus of the atom are positively charged. They usually match the number of electrons and balance the total charge of the atom. An atom with a different number of protons and electrons has a net residual charge (either positive or negative depending which particle is in preponderance) and is called an ion rather than an atom.
The positive equivalent of an electron is called a positron. The protons in the atom's nucleus are made up of a neutron (large mass, no charge) and a positron (negligible mass, positive charge) stuck together. Positrons are nearly always attached to neutrons and don't seem as free to move around as electrons.
Electrons, positrons and neutrons are just the tip of the iceberg when it comes to sub-atomic particles. There are photons, quarks, neutrinos, mesons, hadrons, muons, gluons, etc. and they have all sorts of properties like mass, charge, spin, and a bunch of other weird things going on. I'll stop there with the nuclear physics as I'm not a particle physicist and getting any deeper into it just confuses the hell out of me. ???
Electrons, being negatively charged, are attracted to positively charged things. That's why they move from negative to positive. But we think of voltage as being a positive thing. We talk of such things as +12V and imagine that to be the source of electrical power, with positive volts pushing current towards a negative earth. But for the purpose of analysing basic electrical circuits, it makes no difference from a mathematical point of view if we describe it as a positive charge moving towards a negative pole, or a negative charge moving towards a positive pole. It just comes down to an arbitrary convention.
Cheers,
Cam