Which term refers to the phenomenon of light shining on a metal and causing electrons to break free from their atoms? a. blackbody radiation b. ultraviolet catastrophe c. emission spectra d. photoelectric effect

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.

How many electrons does each element require in its valence shell to become stable?