Fr

Francium

Z 87 223.0 g/molAlkali Metal Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes

Nucleus

87 Protons

136 Neutrons

87 Electrons (1 Valence)

Shell distribution: K2 • L8 • M18 • N32 • O18 • P8 • Q1

Electron Configuration

Energy

7p

6d

5f

7s

6p

5d

4f

6s

5p

4d

5s

4p

3d

4s

3p

3s

2p

2s

1s

[Rn]7s¹

Radii

Oxidation States

Common

Rare

0

+1

Crystal Structure

Body-centred Cubic