1. Department
of Chemical Education, Faculty of Teacher Training and Education, University of Lampung, Bandar Lampung 35145, Indonesia
2. Theoretical
Chemistry Division, Institute of General, Inorganic and Theoretical
Chemistry, University of Innsbruck, Innrain 80-82, A−6020 Innsbruck, Austria
3. Department
of English Education, Faculty of Teacher Training and Education, University of Lampung, Bandar Lampung 35145, Indonesia