Problem: An atom of oxygen has an atomic number of 8 and a mass number of 18. How many of each type of subatomic particle does it contain?

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We’re being asked to determine the number of protons, electrons, and neutrons in oxygen, O-18


Recall that the symbol for an element or ion is as follows:



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Problem Details

An atom of oxygen has an atomic number of 8 and a mass number of 18. How many of each type of subatomic particle does it contain?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Subatomic Particles concept. You can view video lessons to learn Subatomic Particles. Or if you need more Subatomic Particles practice, you can also practice Subatomic Particles practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Santhanago's class at Kean University.