Fr Francium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

Francium History

The element Francium was discovered by Marguerite Perey in year 1939 in France . Francium derived its name from Francia, the New Latin name for France

Francium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Francium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

Crystal Structure of Francium

The solid state structure of Francium is Body Centered Cubic.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)

and the angles between them Lattice Angles (alpha, beta and gamma).

The positions of the atoms inside the unit cell are described by the set of atomic positions ( x_i, y_i, z_i) measured from a reference lattice point.

The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.

Space Group Name	N/A
Space Group Number	N/A
Crystal Structure	Body Centered Cubic

Francium Atomic and Orbital Properties

Francium atoms have 87 electrons and the electronic shell structure is [2, 8, 18, 32, 18, 8, 1] with Atomic Term Symbol (Quantum Numbers) ²S_1/2.

Atomic Number	87
Number of Electrons (with no charge)	87
Number of Protons	87
Mass Number	223
Number of Neutrons	136
Shell structure (Electrons per energy level)	[2, 8, 18, 32, 18, 8, 1]
Electron Configuration	[Rn] 7s1
Valence Electrons	7s1
Oxidation State	1
Atomic Term Symbol (Quantum Numbers)	2S1/2

Shell Structure of Francium - Electrons per energy level

n		s	p	d	f
1	K	2
2	L	2	6
3	M	2	6	10
4	N	2	6	10	14
5	O	2	6	10
6	P	2	6
7	Q	1

Ground State Electronic Configuration of Francium - neutral Francium atom

The ground state electronic configuration of Neutral Francium atom is [Rn] 7s1. The portion of Francium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used.This is important as it is the Valence electrons 7s1, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Francium

Complete ground state electronic configuration for the Francium atom, Unabbreviated electronic configuration

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

Atomic Structure of Francium

Francium atomic radius is N/A, while it's covalent radius is N/A.

Atomic Spectrum of Francium

Francium Chemical Properties: Francium Ionization Energies and electron affinity

The electron affinity of Francium is N/A

Ionization Energy of Francium

Refer to table below for Ionization energies of Francium

Francium Physical Properties

Refer to below table for Francium Physical Properties

Elastic Properties

Hardness of Francium - Tests to Measure of Hardness of Element

Francium Electrical Properties

Francium is N/A of electricity. Refer to table below for the Electrical properties of Francium

Francium Heat and Conduction Properties

Francium Magnetic Properties

Optical Properties of Francium

Acoustic Properties of Francium

Francium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Francium

Enthalpies of Francium

Francium Isotopes - Nuclear Properties of Francium

Isotopes of rhodium. Naturally occurring Francium has 1 stable isotope - None.

Regulatory and Health - Health and Safety Parameters and Guidelines

Database Search

List of unique identifiers to search the element in various chemical registry databases