Valence Electrons

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MaiaRodriguezChoi3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Valence Electrons

Postby MaiaRodriguezChoi3E » Fri Oct 26, 2018 4:21 pm

How do you know how may valence electrons an element or compound has?

nolansheow3G
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: Valence Electrons

Postby nolansheow3G » Fri Oct 26, 2018 4:26 pm

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.

Emily Ng_4C
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Valence Electrons

Postby Emily Ng_4C » Fri Oct 26, 2018 8:02 pm

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.

Douglas Nguyen 2J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

Re: Valence Electrons

Postby Douglas Nguyen 2J » Fri Oct 26, 2018 8:08 pm

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.

Hilda Sauceda 3C
Posts: 76
Joined: Fri Sep 28, 2018 12:24 am

Re: Valence Electrons

Postby Hilda Sauceda 3C » Sat Oct 27, 2018 6:51 pm

Group 2 has 2 valence electrons and group 13 has 3 valence electrons........ etc...


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