everyday science MCQ #1732

Isotopes of an element have the same number of:

everyday science MCQ #1732

  1. Question 1

    Q1. Isotopes of an element have the same number of:

    • A) Protons
    • B) Electrons
    • C) Beta particles
    • D) Neutrons

    Answer: Protons

    Explanation: Isotopes of the same element have the same number of protons (and electrons) — which defines their chemical identity — but differ in the number of neutrons, giving different mass numbers.