Which element has the atomic number 8?

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Multiple Choice

Which element has the atomic number 8?

Explanation:
The atomic number is the number of protons in an atom’s nucleus, and it uniquely identifies the element. The element with eight protons is oxygen, so its atomic number is eight. That’s why oxygen is the correct answer. Nitrogen has seven protons, hydrogen has one, and helium has two, so they correspond to different atomic numbers. Oxygen is also a major part of the air we breathe and forms many compounds essential to life.

The atomic number is the number of protons in an atom’s nucleus, and it uniquely identifies the element. The element with eight protons is oxygen, so its atomic number is eight. That’s why oxygen is the correct answer. Nitrogen has seven protons, hydrogen has one, and helium has two, so they correspond to different atomic numbers. Oxygen is also a major part of the air we breathe and forms many compounds essential to life.

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