What characteristic best identifies a comet?
a)
comets are streaks of light.
b)
comets are larger than asteroids.
c)
comets enter the earth's atmosphere.
d)
comets develop a fuzzy, cloud-like shell called a coma, as well as a tail.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.