What is the final volume of gas that initially occupies 2.50 L at 298 K and is subsequently heated to 321 K?

The image shows a process that releases nuclear energy which statement best identifies the process shown the process must be fusion because energy is released the process must be fusion because of have your nucleus formed a smaller nuclei the process must be fission because a large nucleus breaks into smaller nuclei the process must be fission because neutrons are formed

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

State one important difference between a physical change and a chemical change?