Electrons are capable of emmiting engery in the form of light at very narrow ranges of wavelengths. these wavelengths can be measured to find the electrons? a) mass b) density c) energy level d) specific heat

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.