Wednesday 15 May 2013

Atomic Structure 1.15 deduce the number of outer electrons in a main group element from its position in the Periodic Table.

Number of electrons in groups of the Periodic Table

As you can see, some of the columns of the table have numbers above them, this tells us how many electrons are in the outer shell of that group. It is a good idea to label this on your periodic table in your chemistry exam.

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