Which of the following has kinetic energy? Wind blowing at 3 km/h A fully stretched elastic band A boulder sitting on top of a hill An unused battery

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

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