Quantum-chemical concepts: are they suitable for secondary students?
Φόρτωση...
Ημερομηνία
Συγγραφείς
Papaphotis, G.
Tsaparlis, G.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Royal Society of Chemistry
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Chemistry Education Research and Practice
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Quantum-chemical theories of atomic and molecular structure are now part of the upper secondary curriculum in many countries, despite the fact that many educators are against their use in basic chemistry courses. In this paper, we first summarise the main findings of previous work on chemistry students"™ knowledge and understanding of atomic orbitals, molecular orbitals and related concepts. We then report results of a study with twelfth-grade Greek students. A test was used that required critical thinking, and aimed to find whether students had acquired a deep understanding of the relevant concepts. The findings indicate that such understanding was missing from most students. Students did not have a clear understanding of orbitals, and especially their probabilistic rather than deterministic nature; for many, the orbitals represent a definite, well-bounded space; they did not realise the approximate nature of atomic orbitals for many-electron atoms; the inadequacy of the carbon-atom, ground-state, electron configuration to account for its valency of four was not evident. Implications for instruction and the curricula are discussed.
Περιγραφή
Λέξεις-κλειδιά
quantum chemical concepts, orbitals, misconceptions, conceptual difficulties, upper secondary chemistry
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
http://pubs.rsc.org/en/content/articlelanding/2002/rp/b2rp90011d#!divAbstract
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας