Title

第23講 How the Elements Occur in Nature

Video

640_480_768.MP4

Syllabus

章節大綱

L23_A
22.1. How the Elements Occur in Nature
22.2. The Cycling of Elements Through the Environment
22.3. Metallurgy: Extracting a Metal from Its Ore
22.4. Tapping the Crust: Isolation and Uses of Selected Elements
22.5. Chemical Manufacturing: Two Case Studies