Answer to Question #186425 in Chemistry for Madalena

Question

With regard to the species ¹⁶O^2-, ¹⁹F and ²⁰Ne which statement is true

1. all three species contain 10 electrons
2. The sum of the neutrons in all three species is 27
3. The sum of protons in all three species is 28
4. both fluorine and neon contain 20 neutrons
5. none of the above

Answer 1

Solution:

¹⁶O^2-: (8 protons, 10 neutrons, and 10 electrons);

¹⁹F: (9 protons, 10 neutrons, and 9 electrons);

²⁰Ne: (9 protons, 10 neutrons, and 9 electrons).

Thus,

1. all three species contain 10 electrons - FALSE
2. The sum of the neutrons in all three species is 27 - FALSE
3. The sum of protons in all three species is 28 - FALSE
4. both fluorine and neon contain 20 neutrons - TRUE
5. none of the above - FALSE

Answer: 4) Both fluorine and neon contain 20 neutrons - TRUE.