Which of the following is not part of the big bang theory? a. gravity pulled stars into galaxies. b. in the beginning the universe was too hot for atoms to exist. c. the universe is continuously expanding. d. as the universe expands, galaxies move toward one another.

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

What is the speed of an object at a given moment?