An excited hydrogen atom has an electron in its n = 4 energy level. The electron subsequently drops down to the n = 2 level, emitting a photon. a. What is the wavelength AND type of light (IR, Visible, etc.) emitted by this transition?
b. What is the frequency of the emitted photon?
c. What is the energy of the emitted photon?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

What is happening when the water inside a kettle heats up and begins to boil

Movement that is like a t a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. transfers energy from one location to another a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave