|Week 10 Vocabulary|
in the tall groups (groups 1,2 and 13-18).
They include metals, nonmetals, and metalloids.
|2) Transition Elements||Elements in the short groups (groups 3-12). All are metals.|
|3) Lanthanide Series||Elements 57-71. This is the portion of Period 6 that usually appears below the rest of the Periodic Table. Very soft metals that are hard to tell apart.|
|4) Actinide Series||Elements 90-103. This is the portion of Period 7 that usually appears below the rest of the Periodic Table. All of these elements are radioactive.|
|5) Alkali Metals||All of the elements in Group 1. Silvery solids, low densities, low melting points.|
|6) Halogens||Elements in Group 17 which are very reactive. They are all nonmetals. They combine with Group 1 to form salt.|
|7) Nobel Gases||Elements in Group 18 which do not react with other elements. They are all gases (SNOBS!!!)|
|8) Synthetic Elements||Elements made by man in a lab. They do not occur in nature.|
|9) Compound||A substance containing two or more different elements which are chemically combined. It has different properties than the elements itís made of.|
|10) Molecule||The smallest part of a substance that still has the same properties as that substance. It is made of more than one atom.|