Question

a student is modelling the arrangement of subatomic particles. which of the following best describes how the particles should be arranged or moving? o protons and neutrons at the center, electrons in fixed orbits around them. o protons and neutrons randomly scattered, electrons at fixed positions. o neutrons forming a central core, electrons orbiting in predictable paths. o the marbles should be free to change position with their neighbor.

Explanation:

In an atomic model, protons and neutrons are located in the nucleus at the center, and electrons orbit around the nucleus in specific energy - levels or shells. This is consistent with the Bohr model and modern atomic theory.

Answer:

Protons and neutrons at the center, electrons in fixed orbits around them.