Question

Which one(s) below right about valence electrons?

A
They are all electrons of an atom
B
The number of valence electrons in the atoms of an element determines that element`s chemical properties
C
They are at the outermost shell of the atom.
D
Valence electrons have the highest energy
E
Valence electrons have the lowest energy.

Answer 1

answer choice A, B, and C is right about the valence electrons. For answer choice D and E, Would in it be a more of an element kind of choice. whether the element is closer to the left side of the periodic table or not determines the high and low energy.

Answer 2

Valence electrons are in the outermost area, have the highest energy, and are all electrons of the atom. This would be A,C and D. B might be a variable, as the Alkali Metals are highly unstable.
Electrons described by E are in Ground State.