1. JaKya Pettus Francium (Fr)

2. * Name: Francium * Symbol: Fr * Atomic Number: 87 * Atomic Mass: (223.0) amu * Melting Point: 27.0 °C (300.15 K, 80.6 °F) * Boiling Point: 677.0 °C (950.15 K, 1250.6 °F) * Number of Protons/Electrons: 87 * Number of Neutrons: 136 * Classification: Alkali Metal * Crystal Structure: Cubic * Density @ 293 K: Unknown * Color: Unknown

3. 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s1

4. Francium may be the rarest element found on the Earth. Experts believe that no more than 15 gram of the element exists in the Earth's crust. This element was discovered in 1939 by French chemist Marguerite Perey (1909-975).

5. *B*B orn 19 October 1909 * V illemomble, France (near Paris) Died 13 May 1975 (aged 65) Fields Physics Known for Francium discovery

6. www.youtube.com/watch?v=sS3cIK9jlB8

7. * Francium is highly radioactive * Francium is a heavy and unstable. It has a maximum half-life of only 22 min. It has a low melting point (27 oC, 81 oF) If enough of it would be liquid in a warm room. * Francium is the second rarest element in the Earth’s crust. About thirty grams of francium exists on Earth

8. Francium is the least electronegative of all the elements. That means it should be the most chemically reactive alkali metal. But,is not available in sufficient quantities to show it reacting with water. It is made in tiny quantities in particle accelerators. In theory, its reaction with water would be more violent than cesium’s and very much more violent than sodium’s.

9. Francium has been studied most recently at Stony Brook University, New York. Scientists there trapped up to ten thousand francium atoms at a time using laser beams in a magnetic field in order to measure their properties.

11. Reaction of francium with air: Fr(s) + O2(g) → FrO2(s) Reaction of francium with water: 2Fr(s) + 2H2O(l) → 2FrOH(aq) + H2 Reaction of francium with the halogens: 2Fr(s) + F2(g) → FrF(s) 2Fr(s) + Cl2(g) → FrCl(s) 2Fr(s) + Br2(g) → FrBr(s) 2Fr(s) + I2(g) → FrI(s)

12. lithium, sodium, potassium, rubidium and cesium.

13. * http://www.chemicalelements.com/elements/ fr.html http://www.chemicalelements.com/elements/ fr.html * http://www.chemistryexplained.com/elements /C-K/Francium.html * http://www.chemistryexplained.com/knowled ge/Marguerite_Perey.html#ixzz3lxh4DnnI