How many neutrons could an atom of the element zinc (zn) have?
im confused because its multiple choice and the only options are 30, 36, 65, and i dont know which one it is. can someone ?

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above