Learn how to read the periodic table with this guide from wikiHow: https://www.wikihow.com/Read-the-Periodic-Table

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View full lesson: http://ed.ted.com/lessons/solv....ing-the-puzzle-of-th

How did the periodic table of elements revolutionize our understanding of the world? What scientists contributed to the table we have today? Eric Rosado discusses the key people and discoveries that have molded our understanding of chemistry today.

Lesson by Eric Rosado, animation by Other Scientist Productions.

You probably studied the "regular" periodic table in school—but did you know there are more versions of the periodic table than just the one you know? The periodic table of elements has gone through many iterations since it was first used to organize elements over 150 years ago! Join Michael Aranda in this new episode of SciShow and learn all about them!

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https://iupac.org/what-we-do/
https://www.nde-ed.org/Educati....onResources/HighScho
http://www.chem.tamu.edu/class..../fyp/stone/tutorialn
https://periodic.lanl.gov/about.shtml
https://www.angelo.edu/faculty..../kboudrea/periodic/t
http://www.unesco.org/new/en/b....rasilia/about-this-o
https://www.bipm.org/utils/com....mon/pdf/si_brochure_
http://scienceline.ucsb.edu/getkey.php?key=408
http://www.rsc.org/periodic-table/history/about
https://phys.org/news/2019-01-periodic-table.html
https://forvo.com/word/alexand....re-%C3%A9mile_b%C3%A
https://www.meta-synthesis.com..../webbook/35_pt/pt_da
http://scienceworld.wolfram.co....m/biography/Beguyerd
https://digital.sciencehistory.org/works/s4655h20t
https://www.meta-synthesis.com..../webbook/35_pt/JCE_P
https://www.meta-synthesis.com..../webbook/35_pt/pt_da
https://patents.google.com/patent/US3581409A/en
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https://www.sciencedaily.com/t....erms/electron_config
https://web.archive.org/web/20....160323155930/http://
http://philsci-archive.pitt.edu/3095/
https://link.springer.com/arti....cle/10.1007/s10698-0
http://www.chem.tamu.edu/class..../fyp/stone/tutorialn
https://www.researchgate.net/p....ublication/36444683_
https://www.khanacademy.org/pa....rtner-content/big-hi
https://www.britannica.com/science/atomic-weight
https://www.quora.com/Why-was-....the-spiral-arrangeme

Image Sources:
https://commons.wikimedia.org/....wiki/File:Periodic_T
https://commons.wikimedia.org/....wiki/File:Comparativ
https://commons.wikimedia.org/....wiki/File:Gallium_cr
https://commons.wikimedia.org/....wiki/File:Elementspi
https://commons.wikimedia.org/....wiki/File:Periodic_s
https://commons.wikimedia.org/....wiki/File:Portrait_d
https://commons.wikimedia.org/....wiki/File:Eric_Scerr
https://digital.sciencehistory.org/works/s4655h20t
https://commons.wikimedia.org/....wiki/File:DIMendelee
https://commons.wikimedia.org/....wiki/File:Mendelejev
https://commons.wikimedia.org/....wiki/File:Mendeleev%
https://commons.wikimedia.org/....wiki/File:Alexandre-
https://commons.wikimedia.org/....wiki/File:Telluric_s
https://commons.wikimedia.org/....wiki/File:Benfey,_Th
https://commons.wikimedia.org/wiki/File:P2x.png
https://commons.wikimedia.org/wiki/File:P2M0.png
https://commons.wikimedia.org/wiki/File:P2y.png
https://commons.wikimedia.org/wiki/File:D3xy.png
https://commons.wikimedia.org/wiki/File:D3xz.png
https://commons.wikimedia.org/wiki/File:D3M0.png
https://commons.wikimedia.org/wiki/File:D3yz.png
https://commons.wikimedia.org/....wiki/File:D3x2-y2.pn
https://commons.wikimedia.org/....wiki/File:F4y(3x2-y2
https://commons.wikimedia.org/....wiki/File:F4z(x2-y2)
https://commons.wikimedia.org/wiki/File:F4yz2.png
https://commons.wikimedia.org/wiki/File:F4M0.png
https://commons.wikimedia.org/wiki/File:F4xz2.png
https://commons.wikimedia.org/wiki/File:F4xyz.png
https://commons.wikimedia.org/....wiki/File:F4x(x2-3y2
https://commons.wikimedia.org/....wiki/File:Dmitri_Men

Live from the Nuclear Energy Assembly, NEI President and CEO Maria Korsnick presented the industry’s policy priorities and provided perspective on the future of nuclear energy. This is a once-in-a-generation moment defined by demand for carbon-free, reliable nuclear energy.

The American Nuclear Society, in conjunction with Discovery Education, created a new K-12 STEM education program that started in middle schools across the nation in the fall of 2018. Be sure to check out www.NavigatingNuclear.com and watch the virtual field trip to Palo Verde starting Monday, October 15, 2018.

Nuclear Fusion | Fusion energy explained with Hydrogen atom example | Physics animation video

In this video we will understand how to or more nucleons merge or fuse together to create something more powerful and meaningful.
Let us first understand the meaning of the word NUCLEAR FUSION, Nuclear meaning the process which involves Nucleus and Fusion in English means two or more entities coming together or merging together to form one single entity.
So, nuclear fusion can be simply defined as the fusion or Combination of Nuclei. Scientifically, Nuclear Fusion can be defined as a nuclear reaction, in which lighter nuclei are combined together to form heavier product nuclei with the release of enormous amount of energy.
Lighter Nuclei such as Lithium and Helium when combined together form a Heavier Nucleus. The mass of heavier nucleus is less than the initial reacting nuclei. The word 'heavier' here is phrased in terms of energy released, which is usually enormous, rather than mass. Therefore the law of conservation of energy is satisfied.
Consider the example of two hydrogen nuclei combining to form a deuterium.
The chemical equation for this reaction is1 1H + 1 1H → 2 1H + 0 +1e + 00 v.
Here, one Hydrogen atom combines with another Hydrogen atom giving Deuterium, one Positron and one Neutrino. This Deuterium in turn combines with another Hydrogen nucleus to form a Helium isotope.
That is, 21H + 1 1H → 3 2He(Helium Isotope)
If two such Helium isotopes are fused together, formation of heavier helium takes place.
In other words, 3 2He + 3 2He → 4 2He + 21 1H
These 3steps of nuclear process, where four protons are fused together to form a heavier 4 2He nucleus and enormous amount of energy is a nuclear fusion reaction.
The chemical equation for this nuclear fusion is:
41 1H → 4 2He + 2 0+1e + 2 00v + Q which is the Energy emitted in the Fusion reaction.
(4 protons when fused together give rise to 2 heavier nucleus, 2 positrons, 2 neutrinos and enormous energy.)
But how is this enormous amount of energy being liberated from such a seemingly simple nuclear reaction. To understand this, let us first calculate the loss of mass in the process.
The starting mass is that of four protons, that is 4 X 1.0078 = 4.0312amu, but the final mass of Helium nucleus is 2me= 4.001506amu.
Therefore the loss of mass is 4.0312 - 4.001506 = 0.0297 amu.
This is equivalent to an energy given by Q = (0.0297amu) X 931,5 Mev/amu =27.67 Mev.
Wow......That is a significant energy release coming from the fusion of 4 protons.
However, in spite of such substantial amounts of energy being released in nuclear fusion reactions, there are no full-time nuclear reactors built so far for fusion reaction as it is very hard to control such enormous energy released.

Dorado Learning has an exclusive range of products K-12 products. Our products are already used by over 100,000 students world wide. The range includes K-12 2D and 3D animation library of over 50,000 modules. The modules are structured in a molecular format so that they can be mapped with any curriculum easily.

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NUCLEAR FISSION: In our earlier session, we have learnt about nuclear process.Now let us learn about chain reaction in the nuclear process.A nuclear process in which a heavy nucleus, when bombarded with neutrons split into two nuclei of nearly equal mass along with release of enormous amount of energy is called as nuclear fission.In the above said process, every neutron can cause fission but along with the fission, it also releases 3 more neutrons on every fission reaction.Every neutron that is released can cause another fission reaction.Thus the three neutrons released in turn releases 9 neutrons.In the similar way, reaction continues and neutrons are built up in geometric progression and fission occurs till total uranium gets exhausted in a chain manner.This process is called as chain reaction and these reactions are called as Self-sustained series of fissions.The chain reaction: is a series of nuclear fissions whereby the neutrons produced in each fission cause additional fissions.There are two stages of chain reactions are there.Uncontrolled Chain reaction. Controlled Chain reaction. Uncontrolled chain reaction:In the chain reaction, there is no control on the number of fissions taking place and such reactions are called uncontrolled chain reaction.In this chain reaction more than one of the neutrons produced in a particular fission cause further fissions. So that the number of fissions increases very rapidly. Therefore an enormous amount of energy is released within a few millionths of a second and is released as a violent explosion. An average energy of about 200MeV Mega electron volts would be release per fission.Thus, an uncontrolled chain reaction can generate an incredible amount of energy within a very short time.This is actually what happens in an 'Atom Bomb'.Controlled chain-reaction:

How does a nuclear reactor provide energy? What causes a nuclear meltdown? And how do we make this safe?

All of these questions are answered in this 'Radioactivity' video from The Fuse School GCSE / K12.

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Alfred Emery Maths and English Tutor in Worthing, Brighton, West Sussex

What's the difference between a nuclear reactor and a nuclear weapon? A lot more than you'd think.
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Movie clips from:
Bad Boys (1995), Columbia Pictures
Chain Reaction (1996), 20th Century Fox

Nuclear test film: https://archive.org/details/gov.doe.0800013, https://archive.org/details/gov.doe.0800003, https://archive.org/details/gov.doe.0800000, https://www.youtube.com/watch?v=xwpgmEvlRpM

Aircraft crash test from Sandia National Laboratories (1988)
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Enjoy these videos? Consider sharing one or two.
Help fund future projects: https://www.patreon.com/3blue1brown
Special thanks to these supporters: http://3b1b.co/nn2-thanks
Written/interactive form of this series: https://www.3blue1brown.com/topics/neural-networks

This video was supported by Amplify Partners.
For any early-stage ML startup founders, Amplify Partners would love to hear from you via 3blue1brown@amplifypartners.com

To learn more, I highly recommend the book by Michael Nielsen
http://neuralnetworksanddeeplearning.com/
The book walks through the code behind the example in these videos, which you can find here:
https://github.com/mnielsen/ne....ural-networks-and-de

MNIST database:
http://yann.lecun.com/exdb/mnist/

Also check out Chris Olah's blog:
http://colah.github.io/
His post on Neural networks and topology is particular beautiful, but honestly all of the stuff there is great.

And if you like that, you'll *love* the publications at distill:
https://distill.pub/

For more videos, Welch Labs also has some great series on machine learning:
https://youtu.be/i8D90DkCLhI
https://youtu.be/bxe2T-V8XRs

"But I've already voraciously consumed Nielsen's, Olah's and Welch's works", I hear you say. Well well, look at you then. That being the case, I might recommend that you continue on with the book "Deep Learning" by Goodfellow, Bengio, and Courville.

Thanks to Lisha Li (@lishali88) for her contributions at the end, and for letting me pick her brain so much about the material. Here are the articles she referenced at the end:
https://arxiv.org/abs/1611.03530
https://arxiv.org/abs/1706.05394
https://arxiv.org/abs/1412.0233

Music by Vincent Rubinetti:
https://vincerubinetti.bandcam....p.com/album/the-musi

-------------------
Video timeline
0:00 - Introduction
0:30 - Recap
1:49 - Using training data
3:01 - Cost functions
6:55 - Gradient descent
11:18 - More on gradient vectors
12:19 - Gradient descent recap
13:01 - Analyzing the network
16:37 - Learning more
17:38 - Lisha Li interview
19:58 - Closing thoughts
------------------

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The inspirational John Cooper talking about his experience on the Mathematics SKE (Subject Knowledge Enhancement) Course at the University of Brighton during our Pecha Kucha afternoon in February 2011.

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Calculators.

Maths Day was spectacular. Pupils celebrated an exciting event where they had the opportunity to participate in a range of activities to enhance their numeracy skills. Darts was a great way to improve mental maths while TT Rockstars challenged their times tables knowledge. The Disco rounded off the day and reinforced the importance of maths in everyday life. Rock on!

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I hope this video helps you know a bit more about studying Secondary Maths Education at the University of Brighton from a student who is in her second year.

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