consider an atom that has an electron in an excited state. the electron falls to a lower energy lever. what effect does that have on the electron?

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

Matches the chemical name of each oxide of phosphorus to its chemical formula

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?