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Rhodium (Rh) – Element 45 of the periodic table

Rhodium (symbol Rh) is element number 45 of the periodic table and belongs to the “Transition metal” category. Its atomic mass is about 102.91, and its phase under standard conditions is Solid. This element sits in period 5 and group 9 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 16, 1. The short electron configuration of Rhodium is [Kr] 4d⁸ 5s¹. Known uses of Rhodium include Catalytic converters, Jewelry and Mirrors.

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Properties of Rhodium

Atomic number
45
Chemical symbol
Rh
Atomic mass
102.91
Category
Transition metal
Period
5
Group
9
Phase
Solid
Protons
45
Electrons
45
Neutrons (approx.)
58
Electron shells
2, 8, 18, 16, 1
Outer-shell electrons
1
Discovered
William Hyde Wollaston (1803)

Electron configuration of Rhodium

The electron configuration of Rhodium (Rh), with 45 electrons, is shown below. The last shell (shell 5) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁸ 5s¹
Short configuration
[Kr] 4d⁸ 5s¹
Last shell
5s¹

What is electron configuration and how is it written?

Electron shells of Rhodium

Distribution of 45 electrons of Rhodium across shells K to O:

  1. K2
  2. L8
  3. M18
  4. N16
  5. O1

What is a transition metal?

The transition metals are the d-block elements: usually good conductors of heat and electricity, with several oxidation states, and they form colourful compounds and important catalysts.

Uses of Rhodium

Frequently asked questions about Rhodium

What is the atomic number of Rhodium?

The atomic number of Rhodium (Rh) is 45; that is, every atom of it has 45 protons.

What is the electron configuration of Rhodium?

The electron configuration of Rhodium (Rh) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁸ 5s¹; in short form it is [Kr] 4d⁸ 5s¹, and its last shell is 5s¹.

What is the chemical symbol of Rhodium?

The chemical symbol of Rhodium is Rh.

Where is Rhodium located in the periodic table?

Rhodium is located in period 5 and group 9 and belongs to the “Transition metal” category.

What is the atomic mass of Rhodium?

The atomic mass of Rhodium is about 102.91 (atomic mass units).

What is the phase of Rhodium under normal conditions?

The phase of Rhodium under standard conditions is Solid.

What are the uses of Rhodium?

Uses of Rhodium include Catalytic converters, Jewelry and Mirrors.

Who discovered Rhodium?

Rhodium was discovered by William Hyde Wollaston in 1803.

Elements in the same category as Rhodium (Transition metal)

Scandium (Sc)Titanium (Ti)Vanadium (V)Chromium (Cr)Manganese (Mn)Iron (Fe)Cobalt (Co)Nickel (Ni)Copper (Cu)Zinc (Zn)Yttrium (Y)Zirconium (Zr)Niobium (Nb)Molybdenum (Mo)Technetium (Tc)Ruthenium (Ru)Palladium (Pd)Silver (Ag)Cadmium (Cd)Hafnium (Hf)

See all Transition metals

Rhodium’s group 9 neighbours

Cobalt (Co)Iridium (Ir)Meitnerium (Mt)

Group 9 of the periodic table