How to Find the Inner, Outer and Valence Electrons of an Element - TUTOR HOTLINE

In this video, I explain the following student's question "How many inner, outer, and valence electrons are present in an atom of Manganese?" I break it down step-by-step so you learn exactly how it's done.
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Thanks so much!!!! This is the only video I found useful in KZbin about valence electrons.

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Q: determine how many valence electrons come from each subshell for P in PO4^3- polyatomic ion? Then, O in PO4^3-?

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[@blondy4u1]

I get how to write the electron configuration , but the question says to indicate how many unpaired electrons each atom has. What does that mean?

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[@leiacollado2894]

how do you find the electron shells in an element? for this question Mn

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[@majason2752]

how about the element Te? As i wrote the electron configuration the last part is 5s2 4d10 5p4, but the valance electron of Te is not 16:(

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[@user-jc3xk2ru9f]

How would finding the valence electrons and outer electrons work for chromium and the other exceptions ? Since its an exception and doesn't fully fill the d orbital and technically has 6 valence?

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[@justinchang6763]

Hi, I have a quick question: In your video, you state that the outer electrons are the electrons with the most energy levels, however, isn't 3d have a higher energy level than 4s since the electron wants to fill up the lower energy level first, in this case, 4s instead of 3d, which indicate that 3d has the higher energy level. So isn't the number of outer electrons being 5?

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[@Morthans23]

I've taught biology and Human A&P for many years and now I'm teaching chemistry for the first time. I was confused about the number of valence electrons. I thought it was just the sum of the electrons found in the highest principal energy level(s). In the case of Mn, the 2 electrons in 4s shell would be the only valence electrons. Is this correct? In your video, you say that we would add the 2 electrons in the 4s orbital and the 5 electrons in the 3d for a total of 7. Thanks for your help.

[@claireturro6391]

I teach high school chemistry and I agree with you--valence electrons in this example would only be the outermost electrons, which are in the 4th energy level, or shell and don't include the d electrons. Only s and p electrons are ever valence electrons, d and f electrons will always have a lower energy level number in any given electron configuration that follows the Aufbau Principle.

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SOMEONE HELP ME i've got the question state the outer shell electron configuration of elements in group 15(5). Use n for the shell number. i know how to do all the other stuff like finding the electron configuration for an element but i just don't get this. I looked up the answer and it says it's ns2 np3 but i don't understand how u get 2 that. btw if u see this months ltr someone please answer cus this isn't hw im jus working thnxs

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What is the difference between outer and valence? I know that they are different but I want to put it into simpler words for my students since they are struggling. Pls help!

[@andrewcruz9159]

Depends, in the video, manganese is a transition element, so outer electron is found outer shell. Mn has 2 electrons. For valence electrons, Mn has 7 valence electrons. It is a transition element, it has 1 or more electrons. For representative elements, it has different rule.

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[@ricertolivier5909]

Wait, cant you just take the outside electrons and minus it from the atomic number For example: fluorine's atomic number is 9 and its valence electrons is 7 and 9-7 is 2 If you use this method you also get 2

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[@Helium1887]

What is the difference between an outer electron and a valence electron?

[@melissamaribel]

Outer electrons are the electrons in the highest energy level, while valence electrons are used for bonding two or more elements together. Valence electrons are also the electrons in the outermost shell of an atom.

[@Helium1887]

So wouldn't the valence electrons and the outer electrons be the same thing being that the valence electrons also have the highest energy level?@@melissamaribel

[@melissamaribel]

They aren't the same number and they aren't the same overall. Valence electrons are in the outermost shell but are not found the same way as the outer electrons. You will later learn about lewis structures and how valence electrons are used for bonding so there is a major difference, you just haven't gotten to that section yet. Overall main difference is the use case of these different types of electrons. Outer electrons tell us the highest energy level of the atom and valence electrons tell us how many bonds are possible to be made with that atom.

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How to find the electron configuration for the outer electrons for the following 1. K+ 2.ca²+ 3.cl- 4.s² 5.zn²+ Plz. Help...I'm really confused...I really need your help ...2morrow is our last day submission of our module...

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I guess they are ions and isoelectron configs with noble gases.

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outer electrons of Mn should be 7.

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