click below
click below
Normal Size Small Size show me how
Chemistry; Ch. 3
Crystal Cathedral High School Sophomores (Semester 1; Ms. Rose)
| Question | Answer |
|---|---|
| Group | The elements in a vertical column of the periodic table. |
| Metal | An element that has luster, conducts heat and electricity and usually bends without breaking. |
| Metalloid | An element with some physical and chemical properties of metals and other properties of nonmetals. |
| Nonmetal | An element that is in general does not conduct electricity, is a poor conductor of heat, and is brittle when solid. Many are gases at room temperature. |
| Period | A horizontal row in the periodic table. |
| Periodicity | The tendency to recur at regular intervals. |
| Semiconductor | An element that does not conduct electricity as well as a metal, but that does conduct slightly better than a nonmetal. |
| Transition Element | Any of the elements in Groups 3 through 12 of the periodic table, all of which are metals. |
| Actinides | Inner transition metals; radioactive- none beyond Uranium occur in nature. |
| Halogens | Group 17; active nonmetals- never exist alone in nature, tend to gain one more electron (-1 charge) |
| Inner Transition Metals | Lanthanides and actinides; complex and ever changing atomic structure, changing oxidation states. |
| Lanthanides | "Rare earth metals"; rarely found on earth. |
| Metalloids | Can be semi-conductors; have properties of metals and nonmetals. |
| Metals | Strong; durable; abundant; lustrous; high melting point (MP). |
| Noble Gasses | Group 18; inert, have a full octet of electrons. |
| Nonmetals | Abundant in nature; bad conductors of electricity; gas at room temperature. |