Question

atom of an element with differenr mass number are called​

Answer 1

Answer:

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Explanation:

The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.

Answer 2

Answer:

Explanation:

same atomic number but different mass number  are called isotopes

eg hydrogen has 3 isotope

                         mass no

protium        1

duterium      2

tritium            3