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Project Mentors

This is a group for anyone interested in serving as a mentor to other educators. Also, join this group if you'd like to partner with a mentor for some help.
Mentoring could include help with running global projects and tech support.

Members: 23
Latest Activity: Nov 3, 2013

Comment Wall

Comment

You need to be a member of Project Mentors to add comments!

Comment by POPI MANZ on November 6, 2011 at 5:16am

2011 is the Year of Chemistry .

Egocreanet (www.edscuola.it/lre.html) would like to launch a conceptual innovation on te issue of the CHEMICAL BOND REVISED IN NANO SCALE DIMENSION .See following info.in Italian:

 

2011-Anno Internazionale della chimica-.

The Sceptic-Chymist: Chemical bond-revised”

Paolo Manzelli ; pmanzelli.lre@gmail.com; www.edscuola.it/lre.html

 

Foreword: Nano-ScienceEducation,open debate on nano-scale chemical bond

 

Sono ormai passati 95 anni dalla pubblicazione di Gilbert Newton Lewis sulle perplessita' della formazione del legame chimico (The Atom and the Molecule, J. Am. Chem. Soc . 1916 , 38 , 762) , da allora inizio' il chiarimento su la struttura della materia basata su le concezioni della meccanica quantistica relative alla natura di interscambio elettronico dei legami molecolari.

Lo sviluppo delle concezioni del legame chimico in seguito stato concepito dando forma geometrica alle probabilita' di organizzazione del moto degli elettroni in forma di un numero fondamentale di possibili Orbitali e delle loro ibridazioni in orbitali molecolari, la cui miscelazione e' capace adattarsi alla forma delle molecole proponendo in tal modo una spiegazione intuitiva della formazione della maggiorparte legami chimici . (1)

Ancora oggi sono molte le ragioni per cui merita esplorare le questioni e i problemi riguardanti il legame chimico in particolare di quello “covalente” dato il suo ampio utilizzo in una vastita' di casi di differente comportamento degli atomi che formano molecole di sempre piu' elevata complessita'. (2)

La chimica “sovra-molecolare”, aggrega con interazioni deboli complessi molecolari ci dice che l' accoppiamento elettronico covalente non e' esaustivo, poiche' rimangono ampie possibilita' di interazione che fanno seguito a interazioni spesso causate dalla ibridazione degli orbitali molecolari o da altre tipologie di interazioni deboli non covalenti come il legame a ponte di Idrogeno.(3)

Oggigiorno lo studio della formazione dei legami chimici inizia ad avere una sua nuova focalizzazione nel campo della formazione dei composti atomico-molecolari nano-strutturati che presentano nuove ed inaspettate caratteristiche che aprono panorami applicativi tuttora in gran parte non investigati.(4).

Infatti le teorie degli orbiltali atomici e molecolari definiscono solo aree geometriche di probabilita', e pertanto non avendo significato fisico, gli orbitali dovrebbero essere inattivi e quindi non giocare alcun ruolo nel cambiamento delle proprieta fisiche dei Materiali Nano. Viceversa si e' scoperto che questi orbitali modificano al livello di interfaccia di codificazione la forza di legame in vari tipi di nanostrutture.(5)

Infatti le particelle nella nano-dimensione modificano la loro struttura elettronica con il decrescere della dimensione della loro aggregazione in superficie-nano cosi che si verifica una contrazione delle lunghezze di legame rispetto a quelle normali della struttura “bulk” di conseguenza la forza di legame diventa ” size dependent”. Tale effetto e' essenziale per capire le proprieta' ottiche ed elettromagnetiche e la attivita' catalitica delle nano-particelle.(6)

Se quindi pensiamo che le onde associate alle particelle non siano da considerarsi mere onde di probabilita' ma zone di reale presenza dell' elettrone allora possiamo comprendere come la sovrapposizione degli orbitali possa dar luogo al fenomeno quantistico dell' “entanglement” (*) generando la reale struttura del legame chimico intesa come interazione simultanea a distanza tra “elettroni entangled”. (7), (8)

Biblio On Line

  1. www.tutorvista.com/chemistry/hybridization-chemistry

  2. http://scienceprojectideasforkids.com/2011/covalent-bonds/

  3. http://www.psicolab.net/public/pdfart/7924.pdf

  4. http://www.nano-ou.net/eduIntro2.aspx

  5. www.sciencedaily.com/releases/2007/10/071012095246.htm; http://www.4m-net.org/files/papers/4M2007/380349/PID380349.pdf

  6. http://www.hindawi.com/journals/jnm/2011/670857/

  7. http://www.mednat.org/new_scienza/ENTANGLED-BONDS.pdf

  8. http://www.wbabin.net/Science-Journals/Essays-Mechanics%20/%20Electrodynamics/Download/3718

(*) http://www.facebook.com/groups/ENTANGLEMENT/

Comment by Angule Gabriel on October 15, 2011 at 1:02am

My Name is Angule Gabriel.

I teach High School mathematics and physics at Chavakali High School in Vihiga County of Kenya. I am the country Representative of iEARN and Coordinator of GTP in Kenya.

This year (2011) I was appointed an ICT in Education champion in Sabatia Constituency and District.   I work in partnership as a trainer of trainers with the ICT in Education team of the ministry of Education as I collaborate
with other similar teachers in the other constituencies to design workable
modalities effective use of ICT in Kenyan schools.

My role as an ICT champion is to:

·         Ensure purchase of the right equipment as per minimum specification given by the ICT Integration in Education team

·         Train teachers in the schools on ICT integration skills and resources development

·         Extend the ICT integration in education skills to other schools in and beyond the constituency

·         Innovatively design ICT in education activities for collaboration and partnerships

·         Follow up and make periodical ICT in education reports to the Ministry of Education that will enable an up to date record of
E-readiness in our learning institutions

·         Avoid past incidences of e-waste or dumping

·         Outsourcing for ICT resource that enhance quality, open and continued education.

 

Working with you will strengthen my capacity to perform my duties which also include coordinating operations of iEARN

(http://www.iearn.org)


Comment by Roey Hilliard on September 15, 2011 at 12:20pm
Looking forward to the conference this year! Thinking about submitting a proposal this year as well. 
Comment by Ruth Pluemer on August 15, 2011 at 1:38pm
I am new to this group and would like a mentor to walk me through a new Global Project
Comment by Frank Palatnick on August 31, 2009 at 11:02am
This is a universal pedagogical formula:

E=mc2 Copyright Frank Palatnick All rights reserved

Education equals the facilitation of the minds understanding times collective compassion

In order to help facilitatees to understand concepts (new or old) everybody ( facilitators, administrators, parents, society etc.) must help by using or by being moved by what the student does come to the colloquial ' table ' with. I have 149 others.
Comment by Robert Zenhausern on August 31, 2009 at 10:25am
I direct a non-profit with a mission to support persons with disability and K-12 education. Special education is at their intersection and of special interest. My organization is the Enabling Support Foundation
www.enabling.org.

I am a retired professor of Neuropsychology with strong research skills and many publications and presentations. I am available to help in research design and statistics. I have also been using computers online since 1979. I am also ready to provide support for the design, analysis, and interpretation of theses and dissertations.
 

Members (23)

 
 
 

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