Is fluorine a metal or a nonmetal? how many valence electrons does a fluorine atom have?

Fluorine is a nonmetal because it gains electrons and to form covalent bonds. The amount of valence electrons are -1 which means it needs one more electron. It is also has the most electronegativity and electrons are held very tightly to the nucleus.

The given element is non-metal and the number of valence electrons are 7

Explanation:

There are 2 types of elements in the periodic table:

Metals are the elements which have a tendency to loose electrons and thus they form cations. Example: Sodium will loose 1 electron to form ion.Non-metals are the elements which have a tendency to gain electrons and thus they form anions. Example: Chlorine will gain 1 electron to form ion.

Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.

We are given:

Fluorine is the 9th element of the periodic table having electronic configuration of

This element will gain 1 electron to form ion

Number of valence electron in fluorine element = 2 + 5 = 7

Hence, the given element is non-metal and the number of valence electrons are 7

I’m not sure what your trying to say here.. can you clarify again?

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.