Question

If Z is the symbol for an element, which pair among the following represents isotopes of the same element?
A. 51 51
Z and Z
25 26

B. 51 50
Z and Z
25 25

C. 50 50
Z and Z
25 27

D. 51 50
Z and Z
26 25

Answer 1

B. 51 50
Z and Z
25 25

It is because only this element have equal number of Protons (Bottom number) and are different in atomic masses (upper number)

Hope this helps!

Answer 2

If Z represents the element and the number at the top represents the atomic number, isotopes would be the element with the same atomic number.

What are Isotopes

Isotopes are atoms of the elements with the same atomic number but a different number of neutrons.

Thus, atoms with the same proton or atomic number but a different mass number of neutron would be isotopes of the same elements.

If Z is the symbol of an element with the number at the top representing the atomic number, the options that represent isotopes of the same element would be A and C.

More on isotopes can be found here: https://brainly.com/question/21536220