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Chemical Symbol:   Ra
Atomic Number:   88
Atomic Weight:   226.0254
Melting Point:    °C
Boiling Point:   1500 °C
Density of Solid:     5000 kg m-3
Electron Configuration:     1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s2


Amount in average human body (70kg):   

3.1E-8 mg

Average amount in Earth's crust:    9.0E-7 ppm by mass
Average amount in seawater:   

8.9E-8 µg L-1

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Periodic Table

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This page was last changed on: 04 December 2017.

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