Atoms containing the same number of protons and different numbers of neutrons are what

Atoms with the same number of protons and different numbers of neutrons are called isotopes.The isotopes have nearly identical chemical behaviour but they have different atomic masses and physical properties.  Because the isotopes of an element have different numbers of neutrons they have different masses.

concurrent jurisdiction is the ability to exercise judicial review by different courts at the same time, within the same territory, and over the same subject matter. for instance, a domestic violence matter may be heard in either a general civil court or a family court in the same county. whichever court actually exercises its jurisdiction first will do so exclusively.

pretty sure a is right