given the energy levels of electrons in a hydrogen atom, shown in the table, arrange the photons emitted by the electron transitions from longest wavelength to shortest wavelength.

What should you adjust to make your hard hat fit properly

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.

Abag contains even and odd numbered balls in the ratio of 3: 7, respectively. for each of the following, what is the probability of drawing an even-numbered ball? the total number of balls is 240 and 30 of the odd-numbered balls are renumbered by multiplying the numbers by 4.