Shows a few energy levels of the mercury atom. one valence electron is always in the 6s state; the other electron changes states.

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Which changes of state do the labels represent? a: b: c:

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?