How do you know how many valence electrons an element has?

Author Question: How do you know how many valence electrons an element has? (Read 608 times)

notis

Hero Member
Posts: 596

on: Sep 20, 2013

I am in Integrated Physics and Chemistry and we are learning about the elements and bonding. So could someone please explain valence electrons to me?

TI

Sr. Member
Posts: 434

Reply #1 on: Sep 20, 2013

the column its in on the periodic table. for example if an element is in the third column it has 3 valence electrons. also if it has, for example, 17 valence electrons it would be in the 7th column

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