Question

question 9: standard c.pm.2
how many protons are in fluorine?
a. 7
b. 8
c. 9
d. 10

question 10: standard c.pm.2
how many electrons are in fluorine?
a. 7
b. 8
c. 9
d. 10

question 11: standard c.pm.2
how many neutrons are in fluorine? (hint: use the atomic mass of 19 to find your answer)
a. 7
b. 8
c. 9
d. 10

question 12: standard c.pm.2
which of these is the bohr model for fluorine?
a.
b.
c
d.

Explanation:

Step1: Find fluorine's atomic number

Atomic number of fluorine = 9 (equals proton count)

Step2: Match proton count to option

Protons = 9, so select option c.

Step3: Neutral atom electron-proton equality

Electrons = protons = 9, select option c.

Step4: Calculate neutron count

Neutrons = Atomic mass - Atomic number = $19 - 9 = 10$, select option d.

Step5: Verify Bohr model for fluorine

Fluorine has 9 protons, 10 neutrons, 2 electrons in inner shell, 7 in outer shell. Match to option b.

Answer:

Question 9: c. 9
Question 10: c. 9
Question 11: d. 10
Question 12: b. (the model with 9 P, 10 N, 2 inner electrons, 7 outer electrons)