Respuesta :
Answer:
(37-17=20).
Explanation:
In a neutral Cl atom, there are 17 Protons and electrons. Subtracting the atomic number from the mass number gives us 20 neutrons (37-17=20).
Answer:
17 electrons
Explanation:
20 neutrons (17 protons + 20 neutrons = 37 particles in the nucleus).