
Indium element (In) is in group 13 and period 5 of a periodic table. Indium is in the p-block and it is classified as a post-transition element on the periodic table.
There is a lot more information related to indium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Indium element (Information Table)
- Indium element in Periodic table
- Facts about Indium
- Properties of Indium
- Uses of Indium
Indium Element (Information Table)
The important data related to indium element is given in the table below.
Appearance of indium | Silvery gray lustrous appearance |
Atomic number of indium | 49 |
Symbol of indium | In |
Atomic mass of indium | 114.82 u |
Protons, Neutrons & Electrons in indium | Protons: 49, Neutrons: 66, Electrons: 49 |
State of indium (at STP) | Solid |
Group number of indium in periodic table | 13 |
Period number of indium in periodic table | 5 |
Block of indium in periodic table | p-block |
Category of indium | Post transition element (boron group) |
Bohr model or Electrons per shell or Electrons arrangement in indium | 2, 8, 18, 18, 3 |
Electron configuration of indium | [Kr] 4d10 5s2 5p1 |
Orbital diagram of indium | ![]() |
Valence electrons in indium | 3 |
Electronegativity of indium (on pauling scale) | 1.78 |
Atomic radius of indium (van der Waals radius) | 193 picometers |
Density of indium | 7.31 g/cm3 |
1st ionization energy of indium | 5.786 eV |
Main isotope of indium | 115In |
Melting point of indium | 429.7 K or 156.5 °C or 313.8 °F |
Boiling point of indium | 2345 K or 2072 °C or 3762 °F |
Crystal structure of indium | Tetragonal |
Discovery of indium | By Hieronymous Theodor Richter and Ferdinand Reich (in 1863) |
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Indium element in Periodic table
The Indium element (In) has the atomic number 49 and is located in group 13 and period 5. Indium is a metal and it is classified as a post-transition element.
H | He | ||||||||||||||||
Li | Be | B | C | N | O | F | Ne | ||||||||||
Na | Mg | Al | Si | P | S | Cl | Ar | ||||||||||
K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
Cs | Ba | La* | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn |
Fr | Ra | Ac** | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |
*Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | ||||
**Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |
Facts about indium
Here are a few interesting facts about indium element.
- Indium was given its name from the Latin word “Indicum”, which means violet.
- Indium is the 61st most abundant element present in the earth’s crust.
- The concentration of indium in the earth’s crust is approximately 0.1 ppm.
- Canada produces around 75 tons of indium annually, which makes it a leading producer in the world.
Properties of indium
Here is a list of some physical properties and chemical properties of indium.
Physical properties of indium
- Indium has a silvery-gray lustrous appearance.
- Indium is a soft metal. It also produces a cracking sound when it is bent.
- There are many isotopes of indium, but the most abundant isotope is 115In.
- The melting point and boiling point of indium is 429.7 K and 2345 K respectively.
- The crystal structure of indium is tetragonal.
- Indium has an atomic mass 114.82 u and its density is 7.31 g/cm3.
Chemical properties of indium
- There are 3 valence electrons of indium and it loses these 3 electrons during a chemical reaction.
- Indium does not react with water.
- The electronegativity of indium is 1.78 on a pauling scale.
- The first ionization energy of indium is 5.786 eV.
Uses of indium
Here are some uses of the indium element.
- Indium has a lower melting point, which is why it is also used in manufacturing of fusible plugs.
- Indium is also used in thermistors, rectifiers, etc.
- Indium tin oxide is commonly used in LCD’s.
- Indium is also used with other metals to form an alloy with improved properties.
- The high speed bearings also use a coating of indium metal.
- Indium is also added to gold metal to provide hardness.
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