Question

Given that oxygen-16 and oxygen-18 both have an atomic number of 8, how many electrons, protons, and neutrons do these oxygen atoms contain?

Answer 1

D) Both oxygen isotopes contain 8 electrons and 8 protons but each contains a different number of neutrons - 8 and 10 respectively.

Step-by-step explanation:

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Answer 2

atomic number=protons
So both have 8 protons

protons=electrons
So both have 8 electrons

atomic mass=protons+neutrons
So for oxygen-16, 8+neutrons=16
Oxygen-16 has 8 neutrons
So for oxygen-18, 8+neutrons=18
Oxygen-18 has 10 neutrons