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Learning Objective: Evaluate the number of valence electrons and core electrons from the electron configurations.
Topics: core electrons, valence electrons
In this example problem, we show how to fill a molecular orbital diagram for a diatomic molecule and use molecular bond theory to compare bond order, bond strength, and magnetic properties (paramagnetic or diamagnetic).
Use molecular orbital theory to determine:
a.) the bond order of N2
b.) whether N2 is paramagnetic or diamagnetic
c.) order of increasing bond strength for N2, N22-, N2+
Hello Chemists hope you enjoyed this video thank you for watching!
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My university degree is Medicinal Chemistry and Pharmacology. If you guys would like me to do a video on the career paths for alevel chemistry please let me know in the comments below
All my recommended resources
Some of these models may be in the AQA version because I did AQA however all you have to do is search for the make in your own version
Jim Clark Calculations for AS/A level Chemistry (HIGHLY HIGHLY RECOMMENDED): https://www.amazon.co.uk/Calculations-Level-Chemistry-Jim-Clark/dp/0582411270/ref=sr_1_1?dchild=1&hvadid=80401819684682&hvbmt=be&hvdev=c&hvqmt=e&keywords=jim+clark+calculations+in+chemistry&qid=1589726863&sr=8-1
GCP AS and A level Chemistry Revision guide: https://www.cgpbooks.co.uk/sec....ondary-books/as-and-
Snaprevise(HIGHLY RECOMMENDED): https://snaprevise.co.uk/
Chemguide:
Chemrevise (HIGHLY RECOMMENDED): https://chemrevise.org/
Quizlet: www.quizlet.com
Oxford A-level Chemistry textbook (HIGHLY RECOMMENDED): https://www.amazon.co.uk/AQA-Chemistry-Level-Student-Book/dp/0198351828/ref=asc_df_0198351828/?tag=googshopuk-21&linkCode=df0&hvadid=310913487793&hvpos=&hvnetw=g&hvrand=8145005145446194771&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044962&hvtargid=pla-524196499887&psc=1&th=1&psc=1
Chemsheets: https://www.scisheets.co.uk/
HodderEducation Practical guide: https://www.amazon.co.uk/AQA-level-Chemistry-Student-Guide/dp/1471885143/ref=asc_df_1471885143/?tag=googshopuk-21&linkCode=df0&hvadid=311040585758&hvpos=&hvnetw=g&hvrand=9399351634496333957&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044962&hvtargid=pla-565420167555&psc=1&th=1&psc=1
Pearson Chemistry Lab book: https://www.amazon.co.uk/AQA-level-Chemistry-Book-Science/dp/1292245298/ref=asc_df_1292245298/?tag=googshopuk-21&linkCode=df0&hvadid=310913487793&hvpos=&hvnetw=g&hvrand=15124858193281357426&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9044962&hvtargid=pla-562954778051&psc=1&th=1&psc=1
My Favourite place for Exam questions:
Physicsandmathstutor: https://www.physicsandmathstut....or.com/chemistry-rev
ScienceSkool (HIGHLY RECOMMENDED): http://www.scienceskool.co.uk/
MathsMadeEasy: https://mathsmadeeasy.co.uk/a-....level-chemistry-revi
Alevelchemistry (HIGHLY RECOMMENDED) : http://www.a-levelchemistry.co.uk/
My favourite a-level chemistry youtubers:
Machemguy (HIGHLY RECOMMENDED): https://www.youtube.com/user/MaChemGuy
AlleryTutors: https://www.youtube.com/channe....l/UCPtWS4fCi25YHw5SP
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What's your name? Phedra
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How tall are you? 5ft 3
What year are you in? Year 13 going to university in September/October 2020
What do you study at A-Levels? Biology, Chemistry and English Literature
What Uni degree do you wish to study? Medicinal Chemistry and Pharmacology
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This video outlines the course content for CHEMISTRY, for first year student in the university.
watch now, comments,like and subscrible for more details
#university #chemistry #futo #IMSU #unnnews #UNIZIK #unilag
Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy. Understanding basic chemistry concepts is important for almost every profession. Chemistry is part of everything in our lives.
In this video Chemistry 101 - Atomic Structure, we study atomic structures which refers to the structure of an atom that comprises of Nucleus, Protons, and Neutrons.
Nucleus - is the positively charged center of the atom consisting of protons and neutrons.
Protons - Positively charged subatomic particle forming part of the nucleus of an atom
Neutrons - A subatomic particle forming part of the nucleus of an atom.
Our collection of videos in Chemistry covers most of the syllabus for exams such as WAEC, NECO, JAMB, and GCE.
atomic structure and theory
atomic structure chemistry
atomic structure elements
atomic structure explained
chemistry syllabus for jamb 2020
chemistry topics
chemistry branches
Mobile classroom application is bridging the gap between students and learning by giving them the opportunity to take classes online from anywhere in Nigeria.
Website: https://www.mobileclassroom.com.ng
Mobile Application: https://bit.ly/MobileclassroomApp
In this example problem, we use an element's molar mass and Avogadro's number to convert from grams of an element to atoms of an element.
This crash course chemistry video tutorial explains the main concepts between ionic bonds found in ionic compounds and polar & nonpolar covalent bonding found in molecular compounds.
Chemistry - Basic Introduction: https://www.youtube.com/watch?v=-KfG8kH-r3Y
Unit Conversion Problems:
https://www.youtube.com/watch?v=eK8gXP3pImU
Physical Vs Chemical Properties:
https://www.youtube.com/watch?v=gH1R87ahFvA
Elements, Atoms, & Molecules:
https://www.youtube.com/watch?v=pSJeMJaCkVU
Protons, Neutrons, & Electrons:
https://www.youtube.com/watch?v=65dDZulPhtg
Average Atomic Mass:
https://www.youtube.com/watch?v=JT18bDAadQ0
___________________________________
Ionic and Covalent Bonding:
https://www.youtube.com/watch?v=uDFLHTDJ4XA
Naming Molecular Compounds:
https://www.youtube.com/watch?v=3agUL7-ezXk
Memorize The Polyatomic Ions:
https://www.youtube.com/watch?v=FXBEh7nd9KQ
Writing Formulas - Molecular Compounds:
https://www.youtube.com/watch?v=KrJnnwLDY6o
Naming Ionic Compounds:
https://www.youtube.com/watch?v=5rSgduXqhhU
_____________________________________
Naming Transition Metal Compounds:
https://www.youtube.com/watch?v=eM5mDnQX0k8
Writing Formulas - Ionic Compounds:
https://www.youtube.com/watch?v=GJ4Mds0CWLE
Writing Formulas - Polyatomic Ions:
https://www.youtube.com/watch?v=stu2omPRvbs
Naming Acids In Chemistry:
https://www.youtube.com/watch?v=r7PfTMAFYgs
Introduction to Moles:
https://www.youtube.com/watch?v=EowJsC7phzw
_____________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/
Full-Length Videos and Worksheets:
https://www.patreon.com/MathSc....ienceTutor/collectio
A unit is a frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. Hank thinks this is a thrilling subject, and while you may not agree, it is a subject that is very important if you want to be a scientist and communicate with accuracy and precision with other scientists. So listen up and learn something or Hank might have to kill you! (NOT REALLY!)
Watch this video in Spanish on our new Crash Course en Español channel! https://youtu.be/aMrxhohbkVA
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Table of Contents
Unit Conversion 02:27
Scientific Notation 03:26
Sig Figs 07:40
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View full lesson: http://ed.ted.com/lessons/the-....genius-of-mendeleev-
The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev's periodic table the one that has endured? Lou Serico explains via eka-aluminum, an element whose existence Mendeelev predicted years before it was discovered.
Lesson by Lou Serico, animation by TED-Ed.
This is a chemistry 101 video on atoms: What are atoms? The world is made of 92 different kinds of atoms.
Subscribe to watch more online chemistry courses & science videos:
http://www.youtube.com/channel..../UCiX8pAYWBppIbtUZTf
About Atomic School:
Atomic School supports the teaching of Atomic Theory to primary school & science students .
We provide lesson plans, hands-on classroom resources, demonstration equipment, quizzes and a Teacher's Manual to primary school teachers. Animated videos that clearly explain the scientific ideas supports learning by both teachers and students. As a teacher, you don't have to look anywhere else to implement this program.
Our work has been verified by science education researchers at the University of Southern Queensland, Dr Jenny Donovan and Dr Carole Haeusler, who confirm that primary students are capable of learning much more complex scientific concepts than previously thought, and crucially, that they love it. Students run to class!
The program has been trialed in Australian schools as well as high schools in the Philippines, Iran and India. It is conducted as holiday workshops at the Australian Nuclear Science and Technology Organisation, the Queensland Museum as well as the World Science Festival.
It has attracted wide media interest, including TV, radio and print, and the research data has been presented at prestigious American Education Research Association and Australian Science Education Research Association conferences.
Atomic Theory underlies all the other sciences- genetics, electronics, nanotechnology, engineering and astronomy- so an early understanding will set them up for a more successful learning sequence for all their science subjects, and support their mastery of mathematics as well. We also have extension programs that cover Biology, Physics and Astronomy to an equal depth.
About Ian Stuart (Email: ian.douglas.stuart@gmail.com):
The founder of Atomic School, Ian Stuart, taught Chemistry and Physics for 25 years at senior levels before he realized that his 8-year old son, Tom, could understand Atomic Theory at a much deeper level than he expected. After visiting Tom's class at school, he discovered that his peers could also grasp the abstract scientific concepts, as well as apply it usefully to the real world.
Ian then developed a program to teach the advanced concepts of high school Chemistry, Physics and Biology to students 10 years younger than they normally would. He found that this engaged their interest in modern science early, and sustained it through to high school and beyond. It also sets them up for future success in their academic and career paths.
Ian has a Bachelor's Degree in Chemistry from the University of Queensland and a Master's degree in Electrochemistry from the University of Melbourne.
Connect with Atomic School on social media:
http://facebook.com/AtomicSchool
http://twitter.com/AtomicSchools
http://instagram.com/AtomicSchools
Video transcript:
From a distance, a beach looks like one big smooth thing. But if we look at it through a telescope, we can magnify it and make it look bigger. Now we can see that the beach is not smooth at all, and it's not a single thing. It's made up of a lot of little sand grains. The beach is nothing but all the little sand grains put together. 12. A beach can be made of a thousand TRILLION sand grains.
It's an example of a big thing being made of lots of little things. We could say that the sand grains are the basic building blocks of the beach. How about a forest made of lots of trees? Here's a forest up close, and here's a forest on a distant mountain. Is this Lego parrot just one thing?
We can say that bricks are the basic building blocks of the hut, or that sand grains are the basic building blocks of the beach. But are bricks or sand grains themselves made of anything smaller?
To answer this question we can magnify a sand grain to see what it's made of. Scientists magnify really small things using a microscope, which will make the sand grain look bigger. The most powerful kind is called an electron microscope which can make things look millions of times bigger, so let's use that. Our scientist puts some sand under the microscope and now she looks through the top to see the magnified sand. Here's what she sees when she zooms in. This is what she sees, and now she is zooming in more. Magnifying the sand grain a million times would let her see the sand's building blocks.
Wow, look at those. These marble-shaped particles are the building blocks of the sand. They're called atoms. The word atom means uncuttable, and if you imagine we had a very sharp knife, we could cut the sand into smaller and smaller pieces, but we couldn't make it smaller than an atom because this is the sand's smallest piece. A tiny sand grain is made of 10 million, TRILLION atoms
This video provides a basic introduction for college students who are about to take the 1st semester of organic chemistry. It covers topics such as polar and nonpolar bonds, ionic & covalent bonding, alkanes, alkenes, alkynes, bond length, bond strength, sigma & pi bonds, hybridization, formal charge, functional groups and drawing lewis structures.
Access The Full 1 Hour 42 Minute Video:
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Organic Chemistry PDF Worksheets:
https://www.video-tutor.net/orgo-chem.html
_______________________________________
Full 1 Hour 42 Minute Video on YouTube:
https://www.youtube.com/watch?v=jxvU_GH3mWo
IUPAC Nomenclature:
https://www.youtube.com/watch?v=TYU_JluleME
Join The YouTube Membership Program:
https://bit.ly/46xaQTR
Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, information-dense catalog of all of the different sorts of atoms in the universe, and it has a wealth of information to tell us if we can learn to read it.
Watch this video in Spanish on our Crash Course en Español channel! https://youtu.be/AmOl0v_3jsc
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Table of Contents
Dmitri Mendeleev - 0:45
Mendeleev's Organization of the Periodic Table - 2:31
Relationships in the Periodic Table - 5:03
Why Mendeleev Stood Out from his Colleagues - 7:09
How the Periodic Table Could be Improved - 8:28
More info about the cylindrical periodic table of elements: http://www.av8n.com/physics/periodic-table.htm
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
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Whacky colour changes, magic disappearing water, blowing up dustbins, clouds of steam, thunder air explosions. Are you ready to fasten your seatbelts and enjoy the ‘explosive’ journey?
In his talk, Andrew aims to promote chemistry as the science of remarkable changes, which are often overlooked yet so important in our everyday life. And he does it brilliantly by performing an incredible series of 25 experiments in 15 minutes, totally amazing the audience (who rewards him with a long and deserved standing ovation)!
Andrew Z. Szydło is an internationally acclaimed chemistry teacher. But he’s definitely not the typical chemistry teacher you would expect…
He holds a PhD in the History and Philosophy of Science from UCL, and is an expert on the history of alchemy (his 1994 book ‘Water Which Does Not Wet Hands’ is considered to be the standard reference work on the Polish alchemist Michael Sendivogius.)
But his polymath spirit extends further: he’s a violin, bugle and accordion player, as well as a professional photographer. Throughout the years Andrew has wowed audiences all around the world with his pyrotechnical approach to teaching and demonstrating chemical sciences on stage and has appeared many times on TV. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
Follow us at https://www.facebook.com/AtomicSchool, https://www.instagram.com/AtomicSchools/ and https://twitter.com/atomicschools
Check out how the the Periodic Table is connected to Atomic Structure (protons, electrons and neutrons) at https://youtu.be/3_FJIpKgdV4.
Also check out how protons, electrons and neutrons were discovered at https://youtu.be/kBgIMRV895w.
Introduction video on the periodic table being explained to chemistry school & science students . The video explains how there are 92 naturally occurring elements, one for each kind of atom, and how they are arranged into a table according to their relative weights.
The expanded table is shown, and how this is abbreviated into the common Periodic Table. The division between metals, semi-metals and non-metals is discussed, with notable examples.
It also shows how the elements are arranged in rows and groups, the latter containing elements with similar properties, like members of a family.
Subscribe to watch more online chemistry courses & science videos:
http://www.youtube.com/channel..../UCiX8pAYWBppIbtUZTf
About Atomic School:
Atomic School supports the teaching of Atomic Theory to primary school & science students.
Our work has been verified by science education researchers at the University of Southern Queensland, Dr Jenny Donovan and Dr Carole Haeusler, who confirm that primary students are capable of learning much more complex scientific concepts than previously thought, and crucially, that they love it. Students run to class!
The program has been trialed in Australian schools as well as schools in the Philippines, Iran and India. It is conducted as holiday workshops at the Australian Nuclear Science and Technology Organisation, the Queensland Museum as well as the World Science Festival.
It has attracted wide media interest, including TV, radio and print, and the research data has been presented at prestigious American Education Research Association and Australian Science Education Research Association conferences.
Atomic Theory underlies all the other sciences- genetics, electronics, nanotechnology, engineering and astronomy- so an early understanding will set them up for a more successful learning sequence for all their science subjects, and support their mastery of mathematics as well. We also have extension programs that cover Biology, Physics and Astronomy to an equal depth.
About Ian Stuart (Email: ian.douglas.stuart@gmail.com):
The founder of Atomic School, Ian Stuart, taught Chemistry and Physics for 25 years at senior levels before he realized that his 8-year old son, Tom, could understand Atomic Theory at a much deeper level than he expected.
Ian then developed a program to teach the advanced concepts of high school Chemistry, Physics and Biology to students 10 years younger than they normally would. He found that this engaged their interest in modern science early, and sustained it through to high school and beyond. It also sets them up for future success in their academic and career paths.
Ian has a Bachelor's Degree in Chemistry from the University of Queensland and a Master's degree in Electrochemistry from the University of Melbourne.
Connect with Atomic School on social media:
http://facebook.com/AtomicSchool
http://twitter.com/AtomicSchools
http://instagram.com/AtomicSchools
Video transcript:
In the first video we saw that all the things in the world are made of incredibly tiny particles called atoms. And also that there are 92 different kinds of them. Most things have more than one type of atom in them, but when we do find something containing just one kind of atom, we call it an element. A nugget of gold is an element because it's made of only gold atoms.
The atoms are too small to see with our eyes, even using a good microscope, but if we could zoom in with a magnification of a billion times we could see the individual gold atoms. Each kind of atom had a shorthand way of writing it, called its symbol, using either one or two letters. The symbol for gold is Au, taken from the ancient Latin word it, aurum. The symbol Au could refer to either a single gold atom, or the element gold consisting of many gold atoms.
Scientists have made a list of all the types of atoms, starting with the lightest, hydrogen, followed by the next lightest, helium. Just heavier than these are lithium and beryllium. We could give each element a number showing its place in this list. Hydrogen's number would be 1 as it is the first in the list, helium's would be 2, and so on. Here are the first 20 elements in the list, starting with the lightest, hydrogen, and going all the way to the heaviest, uranium. Since there are 92 elements in the list, uranium's number must be 92
![The Periodic Table of the Elements in Chemistry - [1-2-12]](https://i.ytimg.com/vi/CTwua04Ykso/maxresdefault.jpg)
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In this lesson, you will learn about the periodic table and how it is used in chemistry. We will focus on how the periodic table is organized by atomic number, and discuss how properties of elements are periodic in nature throughout the table due to the electrons in the outer shells of the atoms. We will also discuss atomic mass and valence electrons, including predicting when an atom will gain or lose an electron in a chemical reaction..
