Add and remove protons, neutrons and electrons. Watch the element, charge and mass number change.
| Element | |
| Symbol | |
| Atomic number | |
| Mass number | |
| Charge | |
| Nuclear symbol | |
| Isotope name | |
| Stable? |
Atomic number = protons. Mass number = protons + neutrons. A neutral atom has equal protons and electrons. A charged atom is an ion (you will study ions in Chapter 4.1).