Question

which region is indicated by label b?
orbitals
electron
nucleus
which region is indicated by label a?
orbitals
proton
nucleus

Explanation:

In an atomic model, the nucleus is at the center (label B). Orbitals are regions where electrons are likely to be found (label A).

Answer:

Which region is indicated by label B?

• Nucleus

Which region is indicated by label A?

• Orbitals