It depends on the element. Sodium has 1, magnesium has 2, aluminum has 3 etc.
There are 7 outer orbital electrons in an atom of chlorine, as it has 7 electrons in its outermost energy level.
ionic bond
chlorine has 7 valence electrons.
Oxygen has 2 electrons in the innermost orbital and 6 in the outermost (valence) orbital.
One atom of sodium has one electron in its outermost orbital.
C = 1s2,2s2,2p2 so the outermost (2p) orbital has 2 electrons in Ground State
Two. The valence shell is six and the 6s orbital has 2 electrons.
There are two electrons at most in an orbital, further, they have spins in opposed directions.
helium has 2 valence electrons (in s orbital) and has complete s orbital. So it does not need to gain or lose more electrons to be stable.
13
Be (beryllium) has four electrons total: the first orbital, the 1s orbital, has two, which leaves two electrons in the outer shell.
Aluminum is in group III A, which lets you know that it has 3 electrons in its outermost orbital. Hope this helps.