Directions: Put the number of the definition from the list below into the square with the appropriate term. Check your answers by adding the numbers to see if all the sums of all rows, both across and down add up to the same number, the Magic Number.
| Periods _____ | Atomic number _____ | Symbol _____ | Magic Number _____ |
| Families _____ | Valence _____ | Neutron _____ | Magic number _____ |
| Electron _____ | Mass number _____ | Proton _____ | Magic number _____ |
| Magic number ______ | Magic number _____ | Magic number _____ |
- positive subatomic particle
- vertical columns on the periodic table
- number of protons in an element
- the electrons in the outermost energy level
- represents an element
- negative subatomic particle
- horizontal rows on the periodic table
- number of protons and neutrons
- neutral subatomic particle
