1. Francium is formed from the decay of actinium.

2. Francium-221 has a half-life of 4.8 minutes.

3. Four more elements have melting points slightly above room temperature: francium, caesium, gallium and rubidium.

4. Caesium metal is the most chemically reactive of all metals, except for the almost non-existing francium

5. The Alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr)

6. A gram of Californium-252 can cost $27 million per gram, which makes it considerably more expensive than lutetium, but less than francium

7. Francium should also have a higher electron affinity than caesium and the Fr− ion should be more polarizable than the Cs− ion.

8. Alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr)

9. The first scale of electronegativity was developed by Linus Pauling and on his scale Americium has a value of 1.3 on a scale running from from about 0.7 (an estimate for francium) to 2.20 (for hydrogen) to 3.98 (fluorine)

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