| A | B |
|---|
| octet rule | a full outer level will render an atom inactive |
| metallic reaction | lose electrons and form positive ions when reacting |
| metals | elements with 3 or less electrons in outer level |
| non-metals | elements with five or more electrons in outer level |
| metalloids | generally have four outer electrons |
| shielding effect | inner electrons block the attraction of nucleus for outer electrons |
| nuclear charge | the larger the nuclear charge, the greater the ionization energy |
| radius | the greater the distance between the nucleus of the atom and the outer electrons the lower the ionization energy |
| sublevel | an electron from a full of half filled sublevel requires additional ionization energy |
| catenation | the tendenacy to for rings or chains of similar atoms |
| allotrope | different forms of the same element |
