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Chemistry has existed under various names since ancient times. It has evolved, and now chemistry encompasses various areas of specialisation, or subdisciplines, that continue to increase in number and interrelate to create further interdisciplinary fields of study.
A Química é o estudo da matéria e das mudanças pelas quais ela passa. Aqui, você pode pesquisar vídeos, artigos e exercícios de química por tópico. Mantemos os conteúdos atualizados para que, ao longo do tempo, você possa encontrar aqui material novo ou aperfeiçoado.
Chemistry, the science of the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
Nature Chemistry offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of chemistry,...
Átomos, compostos e iões: Questionário do tema. Tema 2Tema 2: Reações químicas e estequiometria. Acerto de equações químicas 1. Estequiometria ideal. Converter quantidade química em massa. Reações químicas e estequiometria: Questionário 1. Reagente limitante. Reações químicas e estequiometria: Questionário do tema.
The chemistry archive contains legacy chemistry content, and is not being updated with new content. Exercises and mastery mechanics will soon be removed from the chemistry archive. For our most up-to-date, mastery-enabled courses, check out High School Chemistry and AP Chemistry!
PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.
