Krypton element (Kr) is in group 18 and period 4 of a periodic table. Krypton is in the p-block and it is classified as a noble gas element on the periodic table.
There is a lot more information related to krypton which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Krypton element (Information Table)
- Krypton element in Periodic table
- Facts about Krypton
- Properties of Krypton
- Uses of Krypton
Krypton Element (Information Table)
The important data related to krypton element is given in the table below.
|Appearance of krypton||Colorless gas|
|Atomic number of krypton||36|
|Symbol of krypton||Kr|
|Atomic mass of krypton||83.798 u|
|Protons, Neutrons & Electrons in krypton||Protons: 36, Neutrons: 48, Electrons: 36|
|State of krypton (at STP)||Gas|
|Group number of krypton in periodic table||18|
|Period number of krypton in periodic table||4|
|Block of krypton in periodic table||p-block|
|Category of krypton||Noble gas|
|Bohr model or Electrons per shell or Electrons arrangement in krypton||2, 8, 18, 8|
|Electron configuration of krypton||[Ar] 3d10 4s2 4p6|
|Orbital diagram of krypton|
|Valence electrons in krypton||8|
|Electronegativity of krypton (on pauling scale)||3.00|
|Atomic radius of krypton (van der Waals radius)||202 picometers|
|Density of krypton||3.75 g/L|
|1st ionization energy of krypton||14.00 eV|
|Main isotope of krypton||84Kr|
|Melting point of krypton||115.7 K or -157.3 °C or -251.2 °F|
|Boiling point of krypton||119.9 K or -153.4 °C or -244.1 °F|
|Crystal structure of krypton||Face Centered Cubic (FCC)|
|Discovery of krypton||By William Ramsay and Morris Travers in 1898|
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).
Krypton element in Periodic table
The Krypton element (Kr) has the atomic number 36 and is located in group 18 and period 4. Krypton is a nonmetal and it is classified as a noble gas element.
Facts about krypton
Here are a few interesting facts about krypton element.
- Krypton is named after the Greek word “kryptos” (which means hidden).
- Earth’s atmosphere contains very less quantity of krypton (around 1 ppm by volume).
- Krypton is also present in the atmosphere of Mars (with the concentration of only 0.3 ppm).
- Krypton is obtained from the fission of uranium.
- Krypton glows with a smoky white light when it is exposed to electric current under low pressure.
Properties of krypton
Here is a list of some physical properties and chemical properties of krypton.
Physical properties of krypton
- Krypton is colorless, odorless and tasteless gas.
- The melting point and boiling point of krypton is 115.7 K and 119.9 K respectively.
- Krypton has an atomic mass of 83.798 u and its density is 3.75 g/L.
- Krypton has FCC crystal structure.
- There are many stable isotopes as well as synthetic isotopes and out of these isotopes, the most abundant isotope is 84Kr.
- The van der Waals atomic radius of the krypton atom is 202 pm.
Chemical properties of krypton
- Krypton has an electron shell arrangement: 2, 8, 18, 8. This indicates that it has a stable octet and it is chemically inert.
- Krypton is chemically inert gas and so it does not have more chemical properties.
- Krypton reacts with highly reactive fluorine element under certain conditions to form krypton difluoride.
Uses of krypton
Here are some uses of the krypton element.
- Krypton gas is filled in incandescent bulbs which protects the filament from oxidation.
- The isotope of krypton (81Kr), is used to determine the age of ice of polar regions.
- One of the isotopes of krypton is also used in some applications in MRI technology.
- Krypton is also used in double glazed windows which acts as a thermal insulation.
- Krypton is also used for flashes in photography (because krypton can produce bright white light).