Question

how do isotopes of a given element differ? * (0.5 points)
they have different numbers of electrons
they have a different nuclear charge
they have different numbers of protons
they have different numbers of neutrons
2
how are isotopes of a given element the same? * (0.5 points)
they always have the same number of neutrons
they always have the same mass number
they always have the same number of protons
they always have the same number of electrons

Explanation:

Isotopes of an element have the same number of protons (which defines the element), but differ in the number of neutrons. This changes their mass number. For the first question, the difference lies in neutron - count. For the second, the sameness is in proton - count.

Answer:

1. They have different numbers of neutrons
2. They always have the same number of protons