They have the same number of protons in the nucleus and same number of electrons surrounding the nucleus.
Different Isotopes of the same element will each exhibit the same Chemical Characteristics.
Two different neutral isotopes of the same element have the same number of protons in their nucleus, which determines the element's identity. The isotopes differ in the number of neutrons they have, which leads to variations in atomic mass but not in chemical properties.
The number of protons and electrons is the same.
They have the same number of protons and electrons.
The proton and electron number are equal for all isotopes of the same specific element.
They have the same number of protons in the nucleus and same number of electrons surrounding the nucleus.
The atomic number is the same for all isotopes.
The same numbers of protons and of electrons; the difference between isotopes is in the number of neutrons.
The number of protons is identical.
They have the same numbers of electrons and protons.
You have not told us what element "this" element is.
Isotopes are different forms of the same element which have different numbers of neutrons in their atomic nuclei. A given element is identified by the number of protons in its nucleus; that's its atomic number. Two different isotopes of the same element have the same number of protons, but each has a different number of neutrons in its nucleus. Different isotopes of the same element are chemically the same.