If so, what is the star's average absolute magnitude (M) (think average luminosity) to 0.01 magnitudes

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Based on the image below what would an observer on the nighttime side of earth observe?

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.