Question

atoms are made up of tiny particles called protons, neutrons, and electrons that exist at specific locations. protons and neutrons are located in/at the

answer options:
select one of four
last shell of an atom.
first shell of an atom.
center of an atom.
opposite sides of an atom.

Explanation:

In atomic structure, protons and neutrons are located in the nucleus, which is at the center of an atom. Electrons are in electron shells. The other options (last shell, first shell, opposite sides) do not correctly describe the location of protons and neutrons.

Answer:

center of an atom.