These atoms are called isotopes and they have a different number of neutrons.
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No, different samples of an element can have varying atomic masses due to the presence of isotopes. Isotopes are atoms of the same element with different numbers of neutrons, leading to different atomic masses.
They are called isotopes. They have different mass nmbers because they have a different number of neutrons.
Masses.
Isotopes are atoms of an element that have different masses due to a different number of neutrons in their nuclei.
Two atoms are isotopes if they have the same number of protons but different numbers of neutrons in their atomic nuclei. This results in atoms of the same element having different atomic masses.