2.4 The Periodic Table
• The Periodic Table is used to organize the elements in a meaningful way.
• As a consequence of this organization, there are periodic properties associated with the periodic table.
• Columns in the periodic table are called groups.
Several numbering conventions are used (i.e. groups may be numbered from 1 to 18, or from 1A to 8A, and from 1B to 8B).
• Rows in the periodic table are called periods.
• Some of the groups in the periodic table are given special names.
These names indicate the similarities among group members.
Examples:
• Group 1 or (1A): alkali metals
• Group 17 or (7A): halogens
• Metallic elements are located on the left hand-side of the periodic table (most of the elements are metals).
• Nonmetallic elements are located in the top right-hand side of the periodic table.
• Elements with properties similar to both metals and nonmetals are called metalloids and are located at the interface between the metals and nonmetals.
These include the elements B, Si, Ge, As, Sb, and Te.
• Metals tend to be malleable, ductile, and lustrous and are good thermal and electrical conductors. Nonmetals generally lack these properties; they tend to be brittle solids, dull in appearance, and do not conduct heat of electricity well.
CHEMISTRY The Central Science 8th Edition Brown, LeMay, Bursten Ch 2: Atoms, Molecules, and Ions
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- Gary Hi10spro Sakuma
- I have played for 25 years and coached for the last 17 years--certified United States Professional Tennis Association Professional One--worked for Punahou Schools-voted the #1 Sports School in the United States, as a Program Supervisor, in charge of coaching the High Performance Players as well as coordinating programs for K-12 and Tennis Pro Education.
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