Question

what are valence electrons?
valence electrons are the outermost electrons in an atom.
to know how many valence electrons an element has, find the element on the periodic table. the group number indicates how many valence electrons it has.
example:
elements in group 2 will have 2 valence electrons.
elements in group 17 will have 7 valence electrons.
atoms aim to have a full outer shell of electrons - usually 8 valence electrons.
this desire to have 8 electrons in their outer energy level is called the octet rule

Explanation:

Sulfur is in Group 16 of the periodic table. According to the rule that the group number indicates the number of valence - electrons for main - group elements, sulfur has 6 valence electrons.

Answer:

6