Question

how can you find the mass of an atom?
neutrons + protons
neutrons - protons
protons + electrons
protons - electrons

Explanation:

Step1: Recall atomic structure

Atoms consist of protons, neutrons, and electrons.

Step2: Consider mass contributions

Protons and neutrons have significant mass. Electrons have negligible mass.

Step3: Calculate atomic mass

Atomic mass ≈ mass of protons + mass of neutrons.

Answer:

Neutrons + Protons