Which electromagnetic wave has the longest wavelength?

Acontrol during an experiment. might change remains constant does not exist does change

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Which of the following is a physical property flammability heat of combustion solubility and toxicity