Question

Oxygen-18 is a naturally-occuring, stable isotope and is commonly used is scientific studies as a tracer. Using the periodic table, predict the number of electrons, neutrons, and protons in oxygen-18.
A) Oxygen-18 contains 8 electrons, 9 neutrons, and 9 protons.
B) Oxygen-18 contains 8 electrons, 10 neutrons, and 8 protons.
C) Oxygen-18 contains 6 electrons, 10 neutrons, and 8 protons.
D) Oxygen-18 contains 9 electrons, 8 neutrons, and 10 protons.

Answer 1

Oxygen has Atomic number 8 so all isotopes have 8 protons and 8 electrons.

So the number of neutrons in Oxygen-18 = 18 - 8 = 10.

Option B is the correct one.

Answer 2

Answer:

B

Explanation: