Which of the following atoms contains the same number of neutrons as an atom of fluorine-19? (2 points) select one: a. neon-20 b. oxygen-19 c. sodium-22 d. nitrogen-16

1) Number of neutrons of Fluorine -19

The number 19 is the mass number of the atom.

The atomic number of fluorine is 9, which means it has 9 protons (which is constant for any atom of fluor

The number of protons is calculated as the mass number - atomic number = 19 - 9 = 10.

So, look for which of the other atoms have 10 neutrons

2)

element        mass number      atomic number     number of neutrons

Neon-20           20                        10                         20 - 10 = 10

Oxygen-19       19                         8                           19 - 8 = 11

Sodium-22        22                        11                          22 - 11 = 11

Nitrogen-16     16                           7                           16 - 7 = 9

So, the atom that has the same number of nuetrons as Fluorine-19 is Neon-20

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