Where does much of earth's internal heat come from?

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

In 2002, the rare earth elements mine in mountain pass, california was closed because