Question #37196
1 Answer
Dec 5, 2016
19 amu
Explanation:
The mass number of the normal isotope of Florine is 19 amu.
Florine #9 has 9 positive protons.
To be stable Florine normally has 10 neutrons.
Both protons and neutrons have a mass of 1 amu so
9 + 10 = 19
