Respuesta :
Answer:
the answer is D
Explanation:
isotopes; neutrons In a neutral atom of an element, the number of protons and electrons are constant. Isotopes vary in the number of neutral neutrons.
Answer:
the answer is D
Explanation:
isotopes; neutrons In a neutral atom of an element, the number of protons and electrons are constant. Isotopes vary in the number of neutral neutrons.