An electron in a Mercury atom is at the 'g' energy level and returns to the 'd' energy level. List how many possible photons may be emitted by the electron as it returns to the 'd' energy level

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

pretty sure it's false