Reactions cannot occur without a certain minimum amount of energy. what is this amount of energy called?

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.

Explanation for basic character?

What type of electromagnetic radiation has a shorter wavelength than blue light