Large intermolecular forces in a substance are manifested by

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions