CK-12 Foundation
Ck 12: Chemistry: Hydrogen and Alkali Metals
[Free Registration/Login may be required to access all resource tools.] Covers Group I elements, electron configuration, and reactivity.
CK-12 Foundation
Ck 12: Physical Science: Hydrogen and Alkali Metals
[Free Registration/Login may be required to access all resource tools.] Explores group 1 elements (Alkali Metals) and their properties.