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Valence Electrons

Posted: Fri Oct 26, 2018 4:21 pm
by MaiaRodriguezChoi3E
How do you know how may valence electrons an element or compound has?

Re: Valence Electrons

Posted: Fri Oct 26, 2018 4:26 pm
by nolansheow3G
Start by checking the element's location on the periodic table. Elements in Group 1 have one valence electron, those in group 2 have two valence electrons. Then skip to group 13, under Boron. Group 13 elements have 3 valence electrons, then group 14 has 4, group 15 has 5, and so on until you reach group 18, which has a full valence shell.

Re: Valence Electrons

Posted: Fri Oct 26, 2018 8:02 pm
by Emily Ng_4C
You base it off of the group the elements are in. For example, Group 1 would have 1 valence electron. However, the transition metals will vary in how many valence electrons they will have.

Re: Valence Electrons

Posted: Fri Oct 26, 2018 8:08 pm
by Douglas Nguyen 2J
A good reminder of how many valence electrons is to look at the group number, which is typically indicated above the top element of each column. Group 1 has 1 valence electron, 2 has 2 electrons, 13 has 3, 14 has 4, 15 has 5....18 has 8. Groups 3-12, which are the transition metals, behave differently and therefore, this rule of thumb isn't applicable.

Re: Valence Electrons

Posted: Sat Oct 27, 2018 6:51 pm
by Hilda Sauceda 3C
Group 2 has 2 valence electrons and group 13 has 3 valence electrons........ etc...