Understanding Atomic Numbers

Very Easy General Chemistry Atomic Structure And Periodic Trends

In the study of atomic structure, each element is represented by its atomic number, which corresponds to the number of protons in its nucleus. For example, carbon has an atomic number of 6, which means it has 6 protons. The atomic mass, on the other hand, is the weighted average mass of an element's isotopes and usually includes neutrons along with protons. Based on this information regarding atomic structure, which of the following statements is TRUE?

A hydrogen atom has 2 protons, 2 neutrons, and 2 electrons.

Oxygen has an atomic number of 8 and 8 neutrons.

Carbon is represented by the atomic number 6, indicating it has 6 protons.

The atomic mass of an element is always equal to its atomic number.

Hint

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