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What is valency of carban - Scientific Explorer My First Chemistry Kit

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The valency (the number of electrons in the valence shell) of the element carbon is 4.

With most periodic tables of the elements, you can deduce the valency of all of the representative elements [the most common ones in the first 3 rows of the periodic table, and in the first through 8th columns (or groups or families) of the periodic table].

You need only look at the top of each group for the number-letter code (for example, "4A" appears above the group in which carbon resides.

A handy thing about the periodic table is that elements in the same group or family have the same valency. For example, silicon (Si) which is below carbon in the same family as carbon, also has a valency of 4. Another example is that all of the elements in the 1A column (the alkali metals) have the same valency of 1.


Posted on Jan 10, 2011


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Reactions tend to occur that cause the single electrons (dots) to pair up. This occurs because paired electrons are much more stable than single electrons. A strong driving force for a reaction is the going from a less stable state to a more stable state. Hydrogen atoms from H2 molecules (diatomic molecules). H and O atoms combine to form dihydrogen oxide, also known as water!

  • A very simple set of rules allows you to predict the electron dot structures of the representative elements.
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  • In more advanced topics you will also be able to use electron-dot structures to predict the shapes (or geometry) of molecules, including bond angles!
  • So, learning the skill of drawing electron-dot structures is very important to mastering chemistry!


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