PLZ FAST Scientific knowledge is both long lasting and always . changing
non-observable
permanent
untestable

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

The energy released by a nuclear fusion reaction is produced when

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory