Bøger af Antônio Vitor Machado

Difficulties encountered in learning chemistry content are part of the daily lives of many students, especially from public schools, where the available teaching resources are often limited. In view of this, this work aims to use playful activities as a tool for learning the periodic table (TP), in the 3rd year of high school at the state school Antônio Francisco, located in the municipality of Felipe Guerra, RN. For this, the students used the Quis app of the Periodic Table, on the smartphone, together with the interactive Google table available on their website, where they explored the different levels of teaching of the same. After three classes of contact with the application, the students were subjected to some questions about the tool used. Of a total of 30 (thirty) students, 87% (eighty-seven percent) reported that the use of the application facilitated learning and knowledge about TP, demonstrating that the use of playful activities through digital tools can complement traditional teaching in order to add knowledge to students and improve the assimilation of the contents taught in class.

The search for quality of life of today's man has demanded that he must take more and more care of himself and seek to know the foods he consumes and their functions in the body. In this sense, sea salt for human consumption. It is an element of discussion and of extreme necessity for the proper functioning of the human organism. Refined sea salt, also known as common kitchen salt, consists of a mixture of some salts, such as: NaCl (sodium chloride) the main constituent, KIO3 (potassium iodate), responsible for the presence of iodine in salt. Salt is an important nutrient, not only because it is used worldwide in food preparation and conservation, but also because of its intrinsic chemical characteristics, and because it can be ingested regularly in small quantities, which makes it an ideal vehicle for the consumption of other essential micronutrients such as iodine. In Brazil, salt has been fortified with iodine, as determined by ANVISA through Resolution - RDC No 130 of May 26, 2003, in order to avoid serious health disorders caused by the deficiency of this chemical element, so its quality evaluation is essential.