Which of the following examples involves an exothermic change. a. ice melting on a warm day
b. water boiling in a tea kettle
c. gaseous water particles coming together to form fog
d. air in a bicycle tire gaining pressure after a long ride

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic