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

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:

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

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.