9. Which two subatomic particles make up the nucleus of an atom?

There are three main subatomic particles.

Proton (p+) - Located within the nucleus.

Neutron (n) - Located within the nucleus.

These two subatomic particles above are located in the nucleus.

There is also the Electron (e-) which orbits around the nucleus.

Have a awesome night✨Explanation:

As the other answers have stated, protons and neutrons usually make up the nucleus of an atom. Sometimes, however, there are other particles, also composed of three quarks (called hardrons) that can temporarily replace a proton or neutron. These particles can have the same net charge as a proton or neutron, so from the outside the atom would behave the same, barring the very small increase in mass (protons and neutrons are the lightest and most stable baryons). Muons and Taus can also replace electrons.

[content deleted] - user123802726recklesschicken

the answer is c. it will give up it's valence electron to the other atom.