Author: Jean Pierre Nahimana (University of Rwanda), Claude Karegeya (University of Rwanda), Jean Baptiste Nkurunziza (University of Rwanda), Emmanuel Gakuba (University of Rwanda) and Ruth Ntihabose (University of Rwanda)
Abstract: This study sought to establish the impact of low-cost atomic models on secondary school students’ comprehension of electronic configuration and chemical bond concepts in Nyarugenge, Rwanda through the quasi-experimental design. The researchers used achievement tests which had 20 marks, calculated in accordance with predetermined criteria. The pre-test evaluated students’ prior knowledge while the post-test established whether their knowledge had increased after the intervention. An interview established the participants’ perspectives, ideas and feelings. The study concluded that designed low-cost atomic models significantly affect the comprehension of electronic configuration and chemical bond concepts in the process of learning. The study therefore recommends that teachers of Chemistry should create and apply inexpensive atomic models to support the teaching and learning process so that learners can comprehend electronic configuration and chemical bond concepts in the process of learning.