All atoms of an element have the same

Chemistry Regents Exam August 2022

All atoms of an element have the same (1) mass number (2) atomic mass

(3) number of neutrons

(4) number of protons

Explanation: All atoms of an element MUST have the same number of protons (which is equal to the atomic number). Atomic number to an element is like a social security number to a person. Each element has a unique atomic number that is specific to it.

Answer: 4