What does the diagram represent? a) a neutral oxygen atom b) an oxygen atom with 7 protons c) an oxygen ion with a +2 charge d) an oxygen ion with a -2 charge

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

How are positive ions different from neutral atoms