Question

the small dense region consisting of protons and neutrons at the center of an atom
a stable subatomic particle with a positive electric charge
the total number of protons and neutrons in the nucleus of an atom
a subatomic particle that has no electric charge
a subatomic particle whose electric charge is negative
what is a proton? *
20 points
the small dense region consisting of protons and neutrons at the center of an atom
a stable subatomic particle with a positive electric charge
the total number of protons and neutrons in the nucleus of an atom
a subatomic particle that has no electric charge
a subatomic particle whose electric charge is negative
what is an atomic number? *
20 points
the small dense region consisting of protons and neutrons at the center of an atom
a stable subatomic particle with a positive electric charge
the total number of protons and neutrons in the nucleus of an atom
a subatomic particle that has no electric charge
a subatomic particle whose electric charge is negative

Explanation:

• A proton is defined as a stable subatomic particle with a positive electric charge.
• The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element.

Answer:

• For "What is a proton?": a stable subatomic particle with a positive electric charge
• For "What is an atomic number?": the total number of protons in the nucleus of an atom (Note: There is no correct option provided in the given choices for atomic number as the options are about parts of atom (nucleus - first option), proton (second option), mass number - third option (total protons + neutrons), neutron - fourth option (no charge), electron - fifth option (negative charge). But conceptually atomic number is number of protons)