Can someone help please?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine

What is the relationship between ozone and smog?