Choose the letter of the choice that best completes the statement or answers the question. Elements in the same group have the same .
a.
atomic radius.
c.
nuclear charge.
b.
energy level of outer electrons.
d.
number of valence electrons.

What effect does plate tectonics have an organic evolution

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d