What is the wavelength (in nanometers) of a photon emitted during a transition from ni = 6 to nf = 3 state in the H atom? x 10 nm

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

Why can water dissolve many ionic compounds