Which statement is true? Isotopes are atoms that have gained or lost electrons. Isotopes are atoms of different elements which have the same mass. Isotopes of a given element have equal numbers of protons and neutrons. Isotopes of a given element have equal numbers of neutrons. Isotopes of a given element have very similar chemical properties.

The true statement is: <br /><br />Isotopes of a given element have very similar chemical properties.<br /><br />Explanation: Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. This means they have different mass numbers, but because they have the same number of electrons and protons, their chemical properties are very similar.