Respuesta :
- Electrons are the negatively charged sub-atomic particles of an atom.
- Protons are the positively charged sub-atomic particles of an atom.
- Neutrons are the chargeless sub-atomic particles of an atom.
- 12 is the number of neutron in sodium.
Answer:
protons are found in the nucleus but neutrons can be used to determine atomic number and mass number
but I don't know the number of neutrons in sodium