1. Department of Primary Education, Faculty of Education, Artvin Çoruh University, 08100 Artvin, Turkey.
2. Department of Chemistry, Faculty of Arts and Science, Amasya University, 05100 Amasya, Turkey.
3. Department of Chemistry, Faculty of Science, Hacettepe University, 06800 Ankara, Turkey.
4. Department of Chemistry, Faculty of Science, Ankara University, 06100 Ankara, Turkey.