What happens if an atom has too many or too few neutrons? !

Johannesburg kepler, an apprentice of brahe, believed in the heliocentric universe but rejected past astronomers belief in

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins