Designing and Using an Atomic Model Kit with H, C, N, and O Model Atoms Having a Mass Ratio of 1:12:14:16 to Teach the Concept of Mole and Associated Stoichiometric Relationships

Autor/inn/en	Ramesh, Vinay Bapu; Selvam, Athavan Alias Anand; Kulkarni, Surabhi; Manganahalli, Anusha Dattatreya; Bettadapur, Kiran R.
Titel	Designing and Using an Atomic Model Kit with H, C, N, and O Model Atoms Having a Mass Ratio of 1:12:14:16 to Teach the Concept of Mole and Associated Stoichiometric Relationships
Quelle	In: Journal of Chemical Education, 97 (2020) 4, S.986-991 (6 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Ramesh, Vinay Bapu)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Stoichiometry; Chemistry; Secondary School Science; High School Students; Scientific Concepts; Science Instruction; Hands on Science; Models; Science Activities + Suchen Sie Ihr Suchwort? Stöchiometrie; Chemie; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Analogiemodell
Abstract	High school students find reaction stoichiometry and the concept of the mole hard to comprehend. Teachers are well aware of the importance of teaching the mole concept and also the difficulty associated with it. In an attempt to improve the understanding of the mole concept with reduced difficulty, an atomic model kit that provides a hands-on learning experience has been developed and implemented in a class of 40 students. Each model atom consists of spherical neodymium magnets (acting as nucleons) of appropriate number (1 for hydrogen, 12 for carbon, 14 for nitrogen, and 16 for oxygen) enclosed in a hollow spherical Styrofoam casing (acting as an atom) that can be opened when required. These model atoms can be easily weighed using a laboratory balance, to obtain mass ratios of 1:12:14:16. This model kit provides an opportunity to have a hands-on learning experience of abstract concepts such as mass conservation in a balanced chemical reaction, excess and limiting reagents, and the mole and its relation to gram atomic/molecular mass. Herein, we provide a detailed description of the design criteria and the construction of the model atoms. We also provide the activity sheets with the necessary instructions to carry out the hands-on activities and the assessment sheets used for evaluation. (As Provided).
Anmerkungen	Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01