How to Find Valence Electrons on the Periodic Table
For transition metals, it's a bit trickier. Look at electron configurations or consult a reliable chemistry reference.
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Count the number of columns from the left for groups 1-2 and 13-18. The group number usually equals the number of valence electrons!
Just remember: Hydrogen and Helium are special cases! Hydrogen has 1 valence electron, but Helium's got 2 despite being in Group 18.
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