21.2: Group 1: The Alkali Metals (Webpage) (Q1812)
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Li, Na, K, Rb, and Cs are all group IA elements, also known as the alkali metals. The seventh member of the group, francium (Fr) is radioactive and so rare that only 20 atoms of Fr may exist on Earth …
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | 21.2: Group 1: The Alkali Metals (Webpage) |
Li, Na, K, Rb, and Cs are all group IA elements, also known as the alkali metals. The seventh member of the group, francium (Fr) is radioactive and so rare that only 20 atoms of Fr may exist on Earth … |