MEHTA , Sonam; YADAVA, Shalini. A Critical Reflection on the Sequencing of Content Related to the Concept of Ion in NCERT Class IX Science Textbook. SCHOOL SCIENCE, [S. l.], v. 61, n. 4, p. p. 5–12, 2023. Disponível em: http://ejournals.ncert.gov.in/index.php/SS/article/view/3905. Acesso em: 15 jun. 2025.