Doc Brown's Chemistry Clinic

 ADVANCED LEVEL PHYSICAL-THEORETICAL CHEMISTRY

Allow time for graphic images/diagrams/pictures to download © Dr W P Brown

The shapes of Molecules and Ions related to their Electronic Structure

Appendix 1. to 4.

Main molecule/ion shape page

All AS-A2-IB-US grade 11-12 advanced chemistry links * EMAIL query?comment

Molecule shapes, dot and cross diagrams, bond angles for selected molecules and ions of nitrogen, sulfur and chlorine using the valence-shell electron-pair repulsion model (VSEPR) and the dot and cross (ox) diagrams are presented in 'Lewis style' The 'scribbles' will be replaced by neat diagrams eventually!

Appendix 1. Carbon (Group 4/14)

Carbonate ion, CO₃^2-

Appendix 2. Nitrogen (Group 5/15)

Nitrogen(IV) oxide, NO₂ (nitrogen dioxide), nitrate(III) ion, NO₃^- (nitrite ion) and nitrate(V) ion, NO₃^- (nitrate ion)

Appendix 3. Sulphur (Group 6/16)

Sulfur(IV) oxide, SO₂ (sulphur dioxide), sulphate(IV) ion, SO₃^2- (sulphite ion), sulfur(VI) oxide, SO₃ (sulphur trioxide) and sulfate(VI), SO₄^2- ion (sulphate ion)

Appendix 4. Chlorine Group (7/17)

chlorate(III) ion, ClO₂^- (chlorite ion), chlorate(V) ion, ClO₃^- (chlorate ion) and chlorate(VII) ion, ClO₄^- (perchlorate ion)

GENERAL REVISION NOTES

GCE advanced-A2-AS-subsidiary-IB level chemistry examinations * GCE advanced-A2--AS-subsidiary-IB level chemistry examinations * GCE advanced-A2--AS-subsidiary-IB level chemistry examinations SITE PURPOSE EDUCATION - online learning or 'self-private-tuition' using revision notes, quizzes, practice tests involving ADVANCED LEVEL CHEMISTRY in the areas of REVISING only the CHEMISTRY at Doc Brown's Chemistry Clinic via HOMEPAGE in secondary school/schools, 6th form college/colleges, academy/academies or home self-study and may help with 1st year undergraduate university chemistry courses. Hopefully it will encourage interest and understanding of Chemistry, Earth Science and Radioactivity in any country of the world, though the site is written entirely in English. The website is designed to help and unofficially support students/teachers revise-learn/teach the chemistry for modular or co-ordinated examination science courses from UK QCA based AQA, OCR (Oxford and Cambridge), Nuffield, Salters, Cambridge International (CIE), London International, WJEC, CCEA etc. Also, national award assessments-examinations for BTEC-NVQ applied, additional and chemistry science courses, Advanced Subsidiary Level GCE-AS-A2-IB-KS5-BTEC-NVQ exams. National Chemistry assessment levels, International Baccalaureate, K12 higher US grade level examinations for the national curriculum for secondary schools and colleges. The notes should also provide some background theory for a coursework assignment or project. BUT please note that my on-line revision notes and quizzes are no substitute for good classroom teaching-lecturing and thorough studying of your own notes and textbooks, practicing past papers and a copy of the syllabus which are readily downloaded from the examination board sites, but I hope here and there they will lend a tutoring hand on some topic, unit, module etc. For final revision you have to be intellectually honest about what you don't know or follow, YOU have to take the stuff to pieces, analyse what you do/do not understand and reconstruct it so it all makes sense in the end. There is no other way, there are no magic secrets on how to revise and learn, its mainly down to hard work and just good old fashioned study and employing teach-yourself strategies without the need for extra tutors and tutoring lessons. I also think there is too much hit and miss revision using past papers (which I do NOT supply) and not enough systematic revision. I also hope it will help teachers in planning lessons and developing schemes of work for science-chemistry. There are no lesson plans on the site but there are plenty of quizzes to incorporate into classroom activities whether photocopied or on electronic whiteboard projector for use as self-tuition-assessment purposes and a variety of teaching and learning styles and the images may be used in Microsoft Word documents and powerpoint projections. The site seems to be used by a large number of home study tutors, particularly the revision notes. An individual tutor may print out the notes for science-chemistry learning teaching-tuition purposes and for background material for assignments and projects. I have no interest or time in producing WORD.doc or xxxx.pdf files of the notes at the moment. Neither have I time to write up many practical laboratory experiments ('lab'-'labs') at the moment, but the notes contain lots of background information of chemical reactions in terms of observations-balanced equations-reactants-products-theory etc. I also find it difficult to recommend specific exam websites or syllabus textbooks, it depends exactly on what you need, what you have time for, and there are so many of them to choose from and I do not supply past examination papers for classes. The sites resources include revision notes, quizzes and worksheets which provide support for home study or tuition for homework and coursework help e.g. science investigations for any of the key stage courses indicated, but I do not supply lesson plans.  Dr W P Brown GCE A AS A2 IB Advanced-Subsidiary Level Chemistry 10-10-2007 GCE advanced-A2--AS-subsidiary-IB level chemistry examinations * GCE advanced-A2--AS-subsidiary-IB level chemistry examinations * GCE advanced-A2--AS-subsidiary-IB level chemistry examinations