How to determine the number of valence (outer shell) electrons in an atom

Step by step directions on how to determine the number of valence electrons in an atom using a regular periodic table. The valance electrons are the electrons in the outer most main energy level (shell) of the atom. They are important because its the valence electrons that interact with other atoms. So they determine reactivity, what ion's it will form, what it reacts with, etc...

Category:

Education

Tags:

• valence electrons
• outershell electrons
• outer shell electrons
• chemistry
• periodic table
• bluecat

[sunnyjot11]

thanks bro u saved me from my chemistry exam

[luisrock2008]

@Tori4life97 agreed, all the good teachers are always on youtube

[411kiera]

Thank you so much! You are like an angel that saved me before my chem test!! Thanks sooo much. :)

[greth]

THANK YOU!!!!!!

[Beriut45]

THANK YOU SO MUCH!!!!!!!

[psalmistnpraze]

now that answered a question I had about O having an atomic # of 8 but in a dot diagram only 6 Vs...thanks

[honey102392]

THANKSSSS!

[Tori4life97]

Wow I Learned That Better Then Sittinq In A Class For An Hour -.- . . .

[colliehobo]

Thanks, it really helped me

[ernestwhrogers]

good video man, i understand life now! wooohoooo.

this vid is great