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H (o-o)
Hydride H^-

Li
⁺

Be
²⁺
Beryl

B
^{3+, 3-}
Borax

N (o-o)
Nitride
^3-

O (o-o)
Oxide
^2-

F (o-o)
Fluoride
^1-

Na
⁺

Mg
²⁺
Dolomite

Al
³⁺
Bauxite

Si
⁴⁺
Quartz

P
Phosphide
^3-

S
Sulfide
^2-

Cl (o-o)
Chloride
^1-

Ca
²⁺
Limestone

Sc
⁺⁺⁺

Ti
⁴⁺

V
^{3+, 4+, 5+}

Cr
^{2+, 3+}

Mn
^{2+, 3+}

Fe
^{2+, 3+}
Bog ore

Co
^{2+, 3+}

Ni
^2+,3+

Cu
^{+, 2+}
Malachite

Zn
⁺⁺

Ga
³⁺

As
^{3-, 3+, 5+}

Se
Selenide
^2-

Br (o-o)
Bromide
^1-

Rb
⁺

Sr
²⁺

Y
⁺⁺⁺

Ag
⁺

Cd
⁺⁺

In
³⁺

Sn
^{2+, 4+}
Cassiterite

Te
^{2-, 2+, 4+, 6+}

I (o-o)
Iodide
^1-

Cs
⁺

Ba
²⁺

Au
^{+, 3+}

Hg
²⁺

Pb
^{2+, 4+}
Cerussite

Bi
³⁺

Rubidium (Rb)

Rubidium videos

Rubidium (Rb) was discovered in 1861 by German chemists Robert Bunsen and Gustav Kirchhoff. They found it
while analyzing the mineral lepidolite using a technique called flame spectroscopy, which they had recently developed.

The name Rubidium comes from the Latin word Rubidus, meaning deep red, because of the bright red spectral
lines they observed during their analysis. This method of discovery was groundbreaking, as it allowed scientists
to identify elements based on the unique colors they emit when heated, even if the elements were present in tiny amounts.

Rubidium was the second element Bunsen and Kirchhoff discovered using spectroscopy, after their earlier discovery
of cesium in 1860.