What happens to the female sex cell that has left the ovary if it isn't fertilised

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Will mark brainliest how many electrons can be held in the energy level n = 4?