Question

how would you describe the nucleus?
dense and positively charged
tiny and negatively charged
mostly empty space and positively charged
dense and negatively charged

an isotope is different versions of the same element with a different number of
protons
electrons
neutrons
nucleons

Explanation:

The nucleus of an atom is dense and contains positively charged protons, giving it a positive charge. Isotopes of an element have the same number of protons but differ in the number of neutrons.

Answer:

Dense and positively charged, Neutrons