87
Fr
Francium
Francium
Francium (Fr)
Alkali Metals · Solid · Period 7 · Group 1
Element Properties
- Atomic Number
- 87
- Symbol
- Fr
- Atomic Mass
- 223.0197
- Category
- Alkali Metals
- Standard State
- Solid
- Period
- 7
- Group
- 1
- Electronegativity
- 0.7
- Atomic Radius
- 348
- Ionization Energy
- 3.9
- Electron Affinity
- 0.47
- Oxidation States
- +1
- Melting Point
- 300 K (26.85 °C)
- Boiling Point
- —
- Density
- —
- Electron Configuration
- [Rn]7s1
- Year Discovered
- 1939
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Frequently asked questions
What is the atomic number of Francium?
The atomic number of Francium is 87, which equals the number of protons in its nucleus.
What is the atomic mass of Francium?
The atomic mass of Francium is approximately 223.0197 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Francium?
The electron configuration of Francium is [Rn]7s1.
Where is Francium in the periodic table?
Francium is located in period 7, group 1.
When was Francium discovered?
Francium was discovered in 1939.
Related elements
Same group
1
H
Hydrogen
1.008
3
Li
Lithium
7
11
Na
Sodium
22.99
19
K
Potassium
39.098
37
Rb
Rubidium
85.468
55
Cs
Cesium
132.905