Two atoms that are isotopes of one another must have the same number of what? a. neutrons b. protons c. all particles d. atomic mass

Two  atoms that  are isotopes of  one another that   must the same number of   protons ( answer B)

Explanation

Isotope  are two or more forms  of the same element that contain  the same  number of protons and  electron   but different  number  of neutrons. For example  carbon 12  and carbon 14   are both  isotope of carbon. Carbon 12 has 12 neutrons while  carbon 14 has  8 neutrons.

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