Question

the atomic mass is which of the following added together? *
electrons + neutrons
protons + electrons
atomic number + protons
protons + neutrons
which one of the following orbits around the nucleus? *
neutron
electron
proton

Explanation:

1. The atomic mass is the sum of protons and neutrons in an atom's nucleus as electrons have negligible mass compared to protons and neutrons.
2. Electrons orbit around the nucleus in specific energy - levels or shells, while protons and neutrons are located in the nucleus.

Answer:

1. Protons + Neutrons
2. Electron