Use the drop down menus to describe the changes of the subatomic particles

Protons have a +1/positive charge.

Neutrons have a 0/neutral charge.

Electrons have a -1/negative charge.

Explanation:

In Chemistry, we know that Protons are located in the nucleus, determine the element, and have a positive charge. The opposite of a Protons is an Electron, which orbits the nucleus and has a negative charge. Neutrons are found in the nucleus with Protons but has no charge; it only affects the mass.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.