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General information about Francium |
| francium |
| Fr |
| 87 |
| alkani metals |
| 1 |
| 7 |
| s |
| metallic |
| (223) g·mol-1 |
1s2 2s2p6 3s2p6d10 4s2p6d10f14
5s2p6d10 6s2p6 7s1 |
| 2, 8, 18, 32, 18, 8, 1 |
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Physical properties of Francium |
| solid |
| 1.87 g·cm3 |
| 300(K),
27°C, 80°F |
| 950(K),
677°C, 1250°F |
| ? |
| ? |
| ca. 2 kJ·mol-1 |
| ca. 65 kJ·mol-1 |
| ? J·mol-1·K-1 |
| 0.7 (Pauling scale) |
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Atomic structure of Francium |
| ? Å |
| cm³/mol |
| ? Å |
| ? |
| Cubic body centered |
| 180 (+1e) |
| 7s¹ |
| 87 |
| 136 |
| 87 |
| 1 |
| 7s¹ |
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Electron dot
model |
Other languages |
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| Latin: |
Francium |
| Czech: |
Francium |
| Croatian: |
Francij |
| French: |
Francium |
| German: |
Francium - s |
| Italian: |
Francio |
| Norwegian: |
Francium |
| Portuguese: |
Frâncio |
| Spanish: |
Francio |
| Swedish: |
Francium |
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| Element |
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87 |
2
8
18
32
18
8
1 |
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Fr |
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(223) |
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Brief description |
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The melting point of francium is 27 °C, boiling point is 677 °C, and its valence is 1. Francium is the heaviest known member of the alkali metals series. It has the highest equivalent weight of any element and is the most unstable of the first 101 elements of the periodic system. All known isotopes of francium are highly unstable, so knowledge of the chemical properties of this element comes from radiochemical techniques. No weighable quantity of the element has been prepared or isolated. The chemical properties of francium most closely resemble those of cesium.
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Uses of Francium |
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Hystory of Francium |
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- Discoverer: Marguerite Perey
- Discovery Location: France
- Discovery Year: 1939
- Name Origin: Named after France as it was found in Paris, France.
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