someone from connections academy grade 10th need the answer for physical science unit 5 unit test plrease i need it

What is the lowest number energy level where a d sublevel is found

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum

Once similarity and one difference between a mixture of elements and a mixture of compounds