How to Determine Valence Electrons from Periodic Table
Easy peasy! Look at the group number for the main group elements (columns 1-2 and 13-18). That's your valence electrons! For instance, oxygen is in group 16, so it has 6 valence electrons.
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For transition metals, it's trickier 'cause they involve d-orbitals. But for the main groups, just look at the group number. Bingo!
I've been teaching chemistry for years, and trust me, for main groups, the group number works like magic. Students always find it intuitive!
Yeah, just count the columns from left to right for groups 1-2 and 13-18. Ignore transition metals unless you love headaches.
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