the-chemical-symbol-of-the-element-is-represented-by-x-in-the-atoms-given-below-

Question

The chemical symbol of the element is represented by X in the atoms given below:
¹³⁰₅₆X ¹²⁸₅₄X ¹³⁹₅₇X ¹²⁶₅₂X ¹³⁰₅₄X
Determine which atoms have an equal number of neutrons.

Accepted Answer

^{130}_{56}X, ^{128}_{54}X, $$and ^{126}$$_{52}X

Answer

^{130}_{56}X, ^{128}_{54}X, $$and ^{139}$$_{57}X

Answer

^{128}_{54}X, ^{139}_{57}X, $$and ^{126}$$_{52}X

Answer

^{139}_{57}X, ^{126}_{52}X, $$and ^{130}$$_{54}X