Question for the day! Answer this you get 15 points.

Match the term with the definition.

Match these with the a, b, c, and d answers.
1.
Liquid

2.
Solid

3.
Gas

4.
Plasma

Match these with 1, 2, 3, and 4 questions.
a.
particles that slide past one another
b.
an ionized gas of positively and negatively charged particles
c.
particles packed closely together that vibrate in place
d.
particles spread far apart that move around freely.

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?