click below
click below
Normal Size Small Size show me how
Periodic Table
Term | Definition |
---|---|
Alkali Metals (Group 1) | Highly reactive metals. So reactive the they are never found uncombined in nature. Metals soft enough to be cut with a butter knife. |
Alkaline Metals (Group 2) | Fairly reactive metals. Less reactive than alkali metals, but still never found uncombined in nature. They serve as important minerals for our body. |
Transitional Metals (Group 3-12) | Less reactive metals. Hard, dense metals that are useful as building materials, jewelry and coins. |
Periodic Table | A table that arranges all of the known elements in order of increasing atomic number and usually coincides with increasing atomic mass. |
Metals | Solid at room temperature except mercury, shiny luster, ductile, malleable, good conductors of heat and electricity, high density, high melting points, reactive. |
Nonmetals | No luster, poor conductors of heat and electricity, brittle, not ductile, not malleable, low density, low melting points, less reactive than metals. |
Metalloids | Elements on both sides of the zigzag line (on the periodic table) have properties of metals and nonmetals. |