Question

Diagram

atomic number: 9
mass number: 19
Fill in the blanks
with information
on a neutral
fluorine atom
À
to find the number of neutrons
in the nucleus, subtract the
atomic number from the mass
number.
# of protons:
# of neutrons:
# of electrons:
# of positive charges:
# of negative charges:
Total charge of the atom:
#valence electrons:

Answer 1

I hope this help
If mass # 19.97 you change it 20 why because 7 and 9
I hope you understand it