Match the person or item with the correct description. Atomic model contained a sphere of positive charge with negatively charged electrons within it.
Oa. Aristotle
Ob. Thomson
Oc. Bohr
Od. Rutherford
Oe. Chadwick
Of. Democritus
Og. Dalton

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.

What is friction? how does it affect the motion of an object?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?