Question

where is the majority of an atoms mass located?
○ nucleus
○ spread evenly
○ electron orbitals
○ it has no mass

Explanation:

An atom consists of a nucleus (containing protons and neutrons) and electrons in orbitals. Protons and neutrons have significant mass, while electrons have negligible mass. So the majority of an atom's mass is in the nucleus. The "spread evenly" option is incorrect as mass is concentrated. "Electron orbitals" have little mass from electrons. "It has no mass" is wrong as atoms do have mass.

Answer:

A. nucleus