This document summarizes classical and modern atomic models and chemical bonding. It discusses Dalton's early atomic theory, the discoveries of the electron by Thomson and Rutherford's nuclear model. Bohr's quantum model of electron shells and energy levels is introduced, along with how this led to the development of the periodic table and understanding of electron configurations. The main types of chemical bonds - ionic, covalent and metallic - are then outlined based on concepts like the octet rule and sharing or transferring of electrons between atoms.
Structural diagrams,condensed structures and line structures of hydrocarbons.How to identify a substance as Organic and inorganic ?.How to classify hydrocarbons? What is the difference between alkanes,alkenes and alkynes?
This is great Presentation with 3D effects which is all about production of ammonia from natural gas.
I am damn sure you will be getting everything here searching for.
its better to download it and then run in powerpoint 2013.
Pre-reforming
Flow-schemes
Feed-stocks
Catalyst handling, loading & start-up
Benefits of a pre-reformer
Case studies
Effects upon primary reformer
Data analysis
Reactor temperature profiles
Catalyst management
Summary
Branches of chemistry, careers in chemistry, in the chemistry laboratory, laboratory rules, why chemistry apparatus are made of glass, the bunsen burner, differences between a luminous and non-luminous flame, apparatus for measuring volume, temperature, mass, time, etc
Conference for Catalysis Webinar 2021: "The Key Role of Catalysts and Adsorb...Dr. Meritxell Vila
Energy transition is a challenge for refineries and petrochemical plants. In this sense, the role of catalysts and adsorbents will be crucial in three areas:
New schemes of refineries: crude oil to chemicals (COTC)
Production of biofuels
Production of green hydrogen
This presentation was done at Catalysis Webinar 2021, the 24th March.
Structural diagrams,condensed structures and line structures of hydrocarbons.How to identify a substance as Organic and inorganic ?.How to classify hydrocarbons? What is the difference between alkanes,alkenes and alkynes?
This is great Presentation with 3D effects which is all about production of ammonia from natural gas.
I am damn sure you will be getting everything here searching for.
its better to download it and then run in powerpoint 2013.
Pre-reforming
Flow-schemes
Feed-stocks
Catalyst handling, loading & start-up
Benefits of a pre-reformer
Case studies
Effects upon primary reformer
Data analysis
Reactor temperature profiles
Catalyst management
Summary
Branches of chemistry, careers in chemistry, in the chemistry laboratory, laboratory rules, why chemistry apparatus are made of glass, the bunsen burner, differences between a luminous and non-luminous flame, apparatus for measuring volume, temperature, mass, time, etc
Conference for Catalysis Webinar 2021: "The Key Role of Catalysts and Adsorb...Dr. Meritxell Vila
Energy transition is a challenge for refineries and petrochemical plants. In this sense, the role of catalysts and adsorbents will be crucial in three areas:
New schemes of refineries: crude oil to chemicals (COTC)
Production of biofuels
Production of green hydrogen
This presentation was done at Catalysis Webinar 2021, the 24th March.
THE BASIC UNIT OF MATTER IS CALLED ATOM.DIFFERENT ATOMIC THEORIES EVOLVED.NUCLEUS CONSIST OF PROTONS NEUTRONS ELECTRONS LAVOSIER,COULOMB DALTON SIR WILLIAM CROOKES,WIIHELM ROENTGEN, JJ THOMSON RUTHERFORD,NEIL BOHR ILLUSTRATED DIFFERENT THEORIES
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptx
6atom bond
1. 6. Atoms & chemical bond
1. Classical atom models
2. Böhr model
3. Electron structures
4. Periodic system
5. Chemical bonds
2. 1. Chemistry
Science which studies
composition, properties
and transformations of
mixtures and chemical
substances
3. 1. Dalton model
Matter consists of indivisible
particles, called atoms
Elements are substances
which consist of the same
type of atoms
Atoms are combined to
produce molecules according
to ratios of integer numbers
4. 1. Thomson model
1897: Electron discovery (J.J.
Thomson)
1904: Thomson model (plum
pudding)
5. 1. Rutherford model
1911: Gold foil experiment: scattering of α particles
1911: Rutherford model: nucleus and electon shell
6. 2. Atom spectra
Range of frequencies
which are emitted by an
element
Continuous & discrete
spectra
http://chemistry.bd.psu.edu/jircitano/periodic4.html
7. 3. Atom spectra
• Fingerprint of elements
• More transitions as the number of protons increase
8. 2. Plank hypothesis
1900: Planck hypothesis
Particles can only have discrete
quanta of energy which are
proportional to frequency
E = n. hν
h = 6,63.10-34
J.s
9. 2. Böhr model
1913: Niels Böhr described the first
quantum model
Simplest model of an atom: just few
allowed orbits
Prediction of lines in hydrogen
spectrum
10. 3. Electron structures
Levels and sublevels of energy
Level given by a number
(electron shells)
Sublevel given by a letter
Distribution of electrons,
which gives the number of
electrons and their energy
Aufbau law : diagonals
Pauli exclusion law
Valence shell: octet rule
11. 4. History of periodic system
1817: Döbereiner triads
Li/Na /K; Ca/Sr/Ba; Cl /Br /I
1864: Newlands octaves
Li, Be, B, C, N, O, F, Na...
1869: Mendeleiev periodic table
14. 4. Electron structure & periodic system
Atomic number
7 Periods (electron shells)
18 groups same electron
structure in valence shell
(same chemical properties)
Electronic structure
Metals, non metals, noble gases
15. 5. Chemical bond
Electrostatic attraction
between nuclei and
electron shells
Electric repulsión between
electron shells
Chemical bond: minimal
potential energy
Interaction between 2 or
more atoms
16. 5. Ionic bond
Octet rule (Lewis, 1916): Lewis
structures
Metal & non metal combination
Electron ransfer from metal to
non metal
Ions formation
Electrostatic atraction
17. 5. Covalent bond
Non metales combination
Sharing a pair of electrons
Lewis structures
Homoatomic molecules
Bonding (shared) pairs
Non-bonding (unshared pairs)
Multiple bonds: double and triple
18. 10. Metallic bond
All the valence electrons are shared
Sea of electrons /gas of electrons
Free /random motion of electrons