Organización de los elementos, símbolos químicos y propiedades periódicas iniciales.

Cómo se unen los átomos para formar moléculas y compuestos.

The "ABC de Química" (specifically the version often authored by Choppin or similar classic authors) is a staple for high school students (bachillerato) in countries like Mexico, Colombia, and Spain. "Primer Curso" indicates it is designed for the first year of chemistry studies. For many students, this book is their first formal introduction to the periodic table, stoichiometry, and chemical bonding.