Talens, C. et al. 2024. Development of a two-tiered diagnostic test to assess learners’ understanding of the particulate nature of gases. KIMIKA: The Journal of the Kapisanang Kimika ng Pilipinas. 35, 1 (Dec. 2024), 1–16. DOI:https://doi.org/10.26534/kimika.v35i1.1-16.