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How can you determined the number of valance electrons by looking at the periodic table?

Answer

The no of group represents the no of electrons in outer most shell.
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Ask.com Answer for: valance electrons on periodic table
The Periodic Table of Elements
Dmitri Mendeleev generally is credited with the creation of the first periodic table, which charts the chemical elements by atomic number and valence shell electron configuration.
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The valence electrons are the electrons in the last shell or
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1. Use the "Elements with their Symbol and Atomic Number" chart found online at periodic.lanl.gov/list1.html to look up the element's symbol. An element's symbol consists
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A good, easy way to find valence electrons is to use the group number (the columns) minus 10. For example Fluorine's group number is 17. 17 minus 10 is 7. therefor fluorine has 7
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