The mass number is equal to the number of protons plus the number of neutrons. From the periodic table, we can see that chromium has an atomic number of 24, which means its nucleus contains 24 protons. ... Therefore, the chromium-52 isotope contains 28 neutrons in its nucleus.
Answer:
I think sodium it may be wrong soŕry
i believe it called an eclipse
I’m pretty sure it’s the first one