when an electron is admitted from photosystem to it does not return the photosystem cannot trap any more light energy until the “hole” in the photosystem is filled with another electron the source of the electron that fills the “hole” in photosystem 2 is it ATP

Answer 1

No, the source of the electron that fills the "hole" in Photosystem II is actually water. When water is split in the process of photosynthesis, it releases oxygen and electrons that are used to fill the "hole" in Photosystem II. The process of splitting water and releasing oxygen is known as the water-splitting reaction. ATP is produced during the light-dependent reactions of photosynthesis, but it is not directly involved in filling the "hole" in Photosystem II.