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S. Alwin David
Published chemistry PhD and lecturer
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2
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Teaching & Academics
Teaching on Alison since Aug 2021
Dr. S Alwin David teaches chemistry at VO Chidambaram College at Tamilnadu in India. He earned his B.Sc, M.Sc and M.Phil in chemistry at VOC College, which is affiliated to MS University in India. He completed his Ph.D in 2018.

His articles have been published in various peer-reviewed international journals and proceedings of international conferences.
🏆 Top Course by this Course Creator
Chemistry - Atomic Structure
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Free Online Courses by S. Alwin David
Chemistry - Atomic Structure
1.5-3 hrs 1,835 learners
By S. Alwin David
You Will Learn How To

By the end of this course, you will be able to:

  • Describe the Thomson’s atomic model, Rutherford’s atomic model and Bohr’s atomic model
  • Outline Dalton’s atomic theory and Modern atomic theory
  • Define the terms atomic number, mass number, isotopes, isobars, isotones, orbital, valence electrons and valency
  • Discuss the principal quantum number, azimuthal quantum number, magnetic quantum number and spin quantum number
  • Identify the shapes of s orbital, p orbital and d orbital
  • Describe rules for filling electrons in orbitals, i.e. the Aufbau principle, Pauli’s exclusion principle & Hund’s rule
  • Explain and illustrate the electronic configuration of atoms
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CERTIFICATE
Beginner Level
Science
Chemistry - Atomic Structure
1.5-3 hrs
1835 enrolled
The Periodic Table and Periodic Trends
1.5-3 hrs 1,627 learners
By S. Alwin David
You Will Learn How To

By the end of this course, you will be able to:

  • Discuss Johann Dobereiner’s classification and A.E.B. de Chancourtois classification
  • Explain Newlands classification and Lothar Meyer’s classification
  • List the merits and demerits of Mendeleev’s classification
  • Summarize the modern periodic law and long form of periodic table
  • Recall the characteristics and properties of s, p, d and f - block elements
  • Distinguish covalent radius, metallic radius and Van der Waal’s radius
  • Paraphrase the periodic trends in atomic radii and ionic radii of elements
  • Recognize the factors affecting ionization enthalpy and electron gain enthalpy
  • Outline the periodic trends in ionization enthalpy and electron gain enthalpy of elements
  • Describe the variation of electronegativity and valence in periods and groups
course logo
CERTIFICATE
Beginner Level
Science
The Periodic Table and Periodic Trends
1.5-3 hrs
1627 enrolled
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Aviva R.
The course was an enlightening of theoretical knowledge, making complex chemical concepts accessible and engaging.
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Raja R.
I wrongly submitted the star rating.... I could not change it when I try to change it to 5 star... ⭐⭐⭐⭐⭐. It is a very useful course for me... I like this course very much...
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