| A | B |
|---|
| Cations | Positively charged ions |
| halogen | any nonmetal in Group 7A |
| metal | good conductor of heat and electric current |
| inner transition metal | an element whose highest occupied s sublevel and a nearby f sublevel contain electrons |
| representative element | an element whose highest occupied s or p sublevels are partially filled |
| ionization energy | the energy needed to remove an electron from an atom in the gaseous state |
| alkaline earth metal | any element in Group 2A |
| electronegativeity | th tendency of an atom to attract electrons when the atom is in a compound |
| transition metal | an element whose highest occupied s sublevel and a nearby d sublevel contain electrons |
| noble gas | an element in which the highest occupied s and p sublevels are filled |
