A valance electron is one that is associated with an atom. The valence orbit is the one that electron travels in.
single valency. last orbit has 7 electrons.
In fact an electron has no valency, though it is equal to a -1 (minus one) charged anion like Cl-, having a valency of -1
The valency of hydrogen is +1 because it has a tendency to lose an electron while combining with an Elelment. This gives it a positive valency.
Electronic theory is the theory of the behavior of the electron under various conditions including a free electron, a bound electron in either an outer or inner orbit of the atom.
Electron configuration for oxygen (O) is 1s2 2s2 2p4. The valency is 2-.
Valency
It is generally called the valence electron as it determines the valency of electrons.
The path of an electron as it orbits the nucleus. If you mean the orbital, then that is the shell, or level that an electron is on. If you mean the spin, then that's a quality that subatomic particles have (nothing to do with spinning, just a name). An electron's spin is 1/2.
Mercury has 2 valence electrons.
Helium has two valence electrons.
Eight: the valency shell is full.
The valency of halogens is 1. his refers to the ability of an element to takeup or give out an electron to form a complete shell of energy.