It was disproved by the discovery of the electrons
the mass number of fluorine (F) is 19
C. 19
Correct, Was that a question.
Answer:
72.6 grams
Explanation:
I got this answer through stoichiometry. For every 1 mole of Mg, 2 moles of CuBr are consumed. Because of this, multiply the moles of Mg by 2. Then, convert moles to grams.
The last set which is n=4 l=3 m=3 is a valid set
