The mass number of an atom is the number of the atom

Matches the chemical name of each oxide of phosphorus to its chemical formula

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

The number at the end of an isotope’s name is the number.