Chemical elements Éléments chimiques elements (chemical substances) 27 Elements 21 SCIENCE 20 Chemistry 19 Inorganic 14 Composés inorganiques 12 Inorganic compounds 12 Chemicals and Drugs 10 Classification périodique des éléments 10 Inorganic Chemicals 10 Periodic table of the elements 10 periodic table 10 Chimie 7 Loi périodique 7 Periodic law 7 Histoire 5 History 5 Metals 5 Métaux 5 Phenomena and Processes 5 metal 5 Chemical Actions and Uses 4 Elements, Radioactive 4 Delivery of Health Care 3 Disease 3 Diseases 3 Environment and Public Health 3 Environmental Pollutants 3