The number of neutrons in the atoms. This affect some physical properties.
Isotopes of a chemical element have a similar number of protons but a different number of neutrons.
Electrons
The atoms of the isotopes of a particular element vary in the number of neutrons in their nuclei. While they have the same number of protons (which defines the element), the differing neutron counts result in different atomic masses. This variation in neutrons leads to different isotopes, which can exhibit different physical and nuclear properties.
The average of all the naturally occurring isotopes of a particular element are an element's atomic Mass.
Isotopes of a particular element have the same number of protons but a different number of neutrons in their nucleus. This difference in the number of neutrons gives isotopes different atomic mass values.
This statement is incorrect. Isotopes of an element have the same number of protons but differ in their number of neutrons. Rubidium, specifically, has two stable isotopes: Rb-85 and Rb-87, which both have 37 protons but different numbers of neutrons.
An atom or element that have different masses are known as isotopes.
Isotopes of the same element have different numbers of neutrons and mass.
Isotopes of the same element have different number of neutrons.
All atoms of the same element contain the same number of protons and electrons, but atoms of a given element may have different numbers of neutrons. Atoms with the same number of protons but different numbers of neutrons are called isotopes. An element has many isotopes--each with a close, but different number of neutrons.
Isotopes are atoms of the same element that are only different by the number of neutrons they have
They are isotopes of that element, they have different neutron numbers.