Question

the oxygen isotope with 8 neutrons
express your answer as an isotope.
a chemical reaction does not occur for this question
part b
the fluorine isotope with 10 neutrons
express your answer as an isotope.
a chemical reaction does not occur for this question

Explanation:

Step1: Find oxygen's atomic number

Oxygen (O) has an atomic number $Z=8$ (protons = 8).

Step2: Calculate oxygen's mass number

Mass number $A = \text{protons} + \text{neutrons} = 8 + 8 = 16$.

Step3: Write oxygen isotope notation

Isotope format: $^A_Z\text{X}$, so $^{16}_{8}\text{O}$.

Step4: Find fluorine's atomic number

Fluorine (F) has an atomic number $Z=9$ (protons = 9).

Step5: Calculate fluorine's mass number

Mass number $A = 9 + 10 = 19$.

Step6: Write fluorine isotope notation

Isotope format: $^A_Z\text{X}$, so $^{19}_{9}\text{F}$.

Answer:

$^{16}_{8}\text{O}$
$^{19}_{9}\text{F}$