Chemistry Guru - Chemistry Tuition | JC, A Level, H2 Chemistry Tuition Electronic Configuration for First 30 Elements

In this video we want to learn how to write out the electronic configuration for the first 30 elements using the Quantum Model of Atoms.

Based on the Quantum Model, we know that within each principal quantum shell there are subshells and the number of subshells is related to the principal quantum number.

For principal quantum number n = 1, there is 1 subshell 1s.
For principal quantum number n = 2, there are 2 subshells 2s and 2p.
For principal quantum number n = 3, there are 3 subshells 3s, 3p and 3d.
And so on.

Each subshell has a certain number of orbitals and each orbital can hold up to 2 electrons.

Therefore the maximum number of electrons in a subshell is as shown:

When we fill up the electrons, electrons will be added to a subshell with the lowest energy state first, followed by the next most stable state, and so on.

The order of filling up electrons for an element X is as shown:

Notice we fill up electrons to 4s subshell first followed by 3d subshell as 4s subshell is more stable when empty.

When the first 36 electrons are filled, the electronic configuration for element X would look like this:

Take note when the electrons are filled, 3d subshell becomes more stable than 4s subshell, hence we write 3d first followed by 4s.

There's a trick to write out the electronic configuration quickly.

Notice that 1s2 2s2 2p6 will add up to 10 electrons.

3s2 3p6 and 4s2 will also add up to 10 electrons.

3d subshell can also hold up to 10 electrons.

So we can add the electrons by sets of 10 to quickly determine the electronic configuration.

In this video we also discuss some examples, namely:

11Na, 26Fe, 26Fe2+, 24Cr and 29Cu

Try writing out the electronic configuration for these examples and check out the video for the solutions!

Topic: Atomic Structure, Physical Chemistry, A Level Chemistry, Singapore

Found this video useful?
Please LIKE this video and SHARE it with your friends!

Any feedback, comments or questions to clarify?
Suggestions for new video lessons?
Drop them in the COMMENTS Section, I would love to hear from you!

You can also view this video lesson with screenshots and detailed explanation at https://chemistryguru.com.sg/writing-...

Do check out the following for more video lessons:
Physical Chemistry Videos at https://chemistryguru.com.sg/a-level-...
A Level Chemistry Videos at https://chemistryguru.com.sg/a-level-...

If you are looking for A Level Chemistry Tuition, do consider taking up my online classes. More info at https://chemistryguru.com.sg/a-level-...

-~-~~-~~~-~~-~-
Please watch my latest video: "Determine Limiting Reagent"
https://www.youtube.com/watch?v=rdJsG...
-~-~~-~~~-~~-~-

1. atomic structure practice worksheet, electron configuration worksheet, electron configuration diagram, electron configuration of elements, electron configuration practice worksheet, electronic configuration of atoms ppt, electronic configuration of atoms pdf, electron configuration for nitrogen, atomic structure timeline, electronic stores, electron configuration chart, electronic configuration a level chemistry questions, electron configuration of oxygen, electron configuration worksheet, electronic drum set, electronic recycling near me, atomic structure of helium, electronic stores near me, electronic configuration of atoms in hindi, electron configuration practice, atomic structure review worksheet, electronic configuration of all atoms, electronic data interchange, electron configuration of atom sodium, electronic arts, electronic cigarette, atomic structure of carbon, electric bike, electron configuration examples, electron configuration for potassium, atomic structure of oxygen, electron configuration of sodium, electron configuration worksheet answer key, electron configuration practice worksheet, electron configuration of magnesium, electron configuration of atoms and ions worksheet, electronic recycling, electron configuration of atoms and ions lab answers, electron configuration of atom potassium, atomic structure and the periodic table, electron configuration periodic table, atomic structure worksheet answers, electronic express, electron configuration table, electron configuration exceptions, atomic structure of sodium, electron configuration for chlorine, electron configuration คือ, electron configuration, atomic structure practice, electron configuration of atom in ground state, the electronic configuration of atoms worksheet answers, atomic structure worksheet key, electron configuration level one chemistry if8766, atomic structure of nitrogen, atomic structure quizlet, atomic structure quiz, electron configuration คือ อะไร, electron configuration for calcium, electron configuration for sulfur, electronic configuration of atom magnesium, electron configuration for iron, electronic city, electron configuration of excited atoms, electron configuration worksheet answers, electron configuration of atom in excited state, electronic signature, electron configuration fe3+, electron configuration of atoms and ions lab answer key, electron configuration chart, electronic media, electron configuration exceptions, electronic diversity visa lottery, electronic music, electron configuration order, atomic structure worksheet, electron configuration, aqa a level chemistry electron configuration, electron configuration of atom nitrogen, electron configuration of atoms and ions lab, electron configuration for barium, electron configuration periodic table, electron configuration of charged atoms, electron configurations, electronic frontier foundation, electron configuration practice, atomic structure of hydrogen, atomic structure definition, electron configuration pdf, electron configuration of atom silicon, atomic structure review, electronic arts stock, electronic configuration of atoms class 11, electron configuration cu, electron configuration practice worksheet answer key, electron configuration for bromine, electronic configuration of atoms in periodic table, electronic engineering, atomic structure crossword, electron configuration for carbon, atomic structure of gold, electronic shop near me, electron configuration calculator

Electronic Configuration for First 30 Elements
5 Likes	5 Dislikes
159 views views	1,940 followers
Education	Upload TimePublished on 12 Nov 2018