How to write electron configurations and what they are

Writing electron configuration for different elements is quite simple with the use of a periodic table. Simply split the periodic table into s,p,d and f blocks and use the period # to determine the energy level (d 1 behind, f 2 behind)
If you are interested in this video, you might like my new book Teaching Introductory Chemistry www.amazon.com...
Exceptions to this do occur for Cr, Cu and many others in the transition metals.
Ions have additional electrons or missing electrons
IE F 1s2 2s2 2p5 and F- is 1s2 2s2 2p6
Na is 1s2 2s2 2p6 3s1 and Na+ is 1s2 2s2 2p6
An electron configuration is a simple description where labels are applied to each electron in an element that later can be used to discuss why electrons exhibit specific behaviors in ionization energies, chemical reactions and bonding.
The rules for why electron configurations are what they are come from quantum mechanics and some basic information about quantum numbers and the rules such as Hund's rule, Pauli's exclusion principle and the Aufbau principle are discussed.

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i wondered where all the numbers and letters coming from... why couldn't my teacher just tell us they were divided into blocks and we using the numbers for the groups... thank you so much

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What a way to teach electronic configuration!! Every teacher should teach like you.

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No where near Quantum Physics yet, I am currently taking Chem 2 as a college student, but Mr Milam did a good job explaining configs, and gave me a nice brief of explanation for its relation to Quantums.

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Great teaching. My only critique is when you do the orbital filling diagram, the arrows should be HALF arrows to denote it’s only only electron. The double arrow is reserved for electron pairs.

[@julianwooten1172]

meant to write it’s only one electron

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this is a fantastic video....i think it really helped to see the periodic table as you do the configurations. I tried to read the steps to doing this and i failed...... miserably!

[@kisho2679]

Since for the electron configiration of the d-bock periods you have to subtract -1, so why are those d-block periods not just depicted one row abowe in the periodic table of elements (then it would be easier to directly read instead of conducting this subtraction as exeption)?

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I am still confused about why on the 4th row you didn't put the 4d, why did you put 3d? And thanks for the video! It really helped me.

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So... what do you do with this information? You have the configuration, n, l, m, and s.. then what?

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Have you ever tracked a electron or proton how do you know it’s the same electron or proton that originally was shared. I put a question on here but don’t know where it went.

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Can you find the electronic configuration of Lead?

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Looking at the periodic table, why are Groups labelled horizontally? I thought Groups were vertical and periods were horizontal?

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Why it has to be 3d for the Br...why not 4d because it in the line 4...can somebody explain it

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Plzz sir tell me is there any 1st row in p block??

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Can an element's energy be calculated based on the electron configuration?

[@APphyzicks]

What do you mean by an element's energy? The energy of an electron/rest of atom is influenced by the orbital state, other electrons repulsion, and attraction to the nucleus. But a 3d electron in different atoms will have different energies depending on the variation in electron repulsion and nuclear attraction.

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Isn't Silver Ag?

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