Question

element arrangement quick check
which property of an atom is described by the atomic number? (1 point)
○ the number of protons
○ its mass
○ the number of neutrons
○ its charge

Explanation:

The atomic number of an atom is defined as the number of protons in its nucleus. It uniquely identifies an element. Mass is related to protons and neutrons combined, number of neutrons is different from atomic number, and charge is related to the balance between protons and electrons.

Answer:

the number of protons