This is a public JSON based API,which gives information about Chemical Elements.Ideal to use in any of your Chemistry related projects,feel free to make some amazing code project.
Base URL:https://chemistrydata.herokuapp.com/
API documentation:https://drive.google.com/file/d/10hFZmmxUmn2gPiG6mlpsI-XWlAMjf035/view?usp=drivesdk