The Periodic Table

Here is a copy of The Periodic Table of Elements. It shows the first 109 chemical elements. There are a few more, but they are only found inside nuclear reactors and do not last very long. I call them “silly elements” because they are radioactive and have very short half-lives.

Elements in light green boxes are all solids at room temperature. The liquids are shown in light blue boxes and the gases in yellow boxes. Each box shows the chemical symbol and atomic number. It would be a good idea to memorize the names and symbols for the first 20 elements and some others which you know are important: i.e. Gold, Silver, Iron. Just make up your own mind which ones are the most important.

There are a few important points to know about the table:

  1. Elements in vertical columns have very similar properties.
  2. Hydrogen is an exception being a gas and non-metal
  3. Columns are called “Groups”.
  4. Group I are the Alkali Metals eg Lithium
  5. Group II are the Alkaline Earth Metals e.g. Beryllium
  6. Group VII are the Halogens e.g. Fluorine
  7. Group VIII are the “Noble Gases” e.g. Helium
  8. The metals in the middle of the table are called “Transition Metals” e.g. Iron
  9. Elements 57 to 71 are called the “Lanthanum Series” or “Lanthanides”
  10. Elements 90 to 103 are called the Actinium Series” or “Actinides”

N.B. If the mass number is in brackets it means that it is the mass of the most stable isotope.

You can open this Macromedia Flash animation (Periodic Table) as a standalone full screen page, but you will need to use the backutton to return to the main site.

3 Responses to The Periodic Table

  1. Lynda Ellery says:

    Thanks for this useful site. Please note that the atomic mass number of Plutonium is coming up as (20( and should possibly be (209).
    Cheerio, Lynda

  2. rex says:

    This is a great site

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