What do isotopes of a given element have?

Let's first talk about what an atom is. The smallest component of an element, an atom is made up of a massive solid mass called the atom's nucleus at the core.
The positively charged protons and the neutral protons, collectively known as the protons, make up the atom's nucleus. The negatively charged electrons, which surround the nucleus in fixed circular orbits, are located outside the nucleus.
The mass number, or A, of the atom is determined by adding the protons and neutrons together. Protons provide information about the atomic number of the atom, or Z.

Isotopes are substances, whether they be elements or compounds, that have the same atomic number but a different mass number.
In layman's terms, we can state that while they each have an equal amount of protons in their nuclei, they each have a distinct number of neutrons.
This means that while the isotopes of a given element contain both positively charged and neutral particles, the number of neutral particles is greater than that of positively charged ones.

Therefore, isotopes of a given element have the e same chemical properties and different numbers of neutrons.

Hence, option D is correct.