Explain the quantum model and how Niels Bohr determined the principal and angular quantum numbers. Be prepared to provide this information for an element in rows 1 - 5.

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

A. burning woodcombustion is the process of burning something. make brainliest if correct