- Kr Atomic Number
- Krypton Outside Particles
- What Is Kr Atomic Number
- Number Of Protons In Krypton
- Krypton Atomic Structure
The Element Krypton
[Click for Isotope Data]
Atomic Number: 36
Kr Atomic Number
Atomic Weight: 83.798
Melting Point: 115.79 K (-157.36°C or -251.25°F)
Boiling Point: 119.93 K (-153.22°C or -243.80°F)
Krypton-81 Please visit the Krypton element page for information specific to the chemical element of the periodic table. Since krypton is in the far right row of the periodic table, its outermost shell is full with eight electrons. This is one of the happy elements and has an electron configuration of 2-8-18-8. The other inert gases including argon and xenon also have full outer shells with eight electrons. The inert gases have a valence number of 0.
Density: 0.003733 grams per cubic centimeter
Phase at Room Temperature: Gas
Element Classification: Non-metal
Period Number: 4
Group Number: 18
Group Name: Noble Gas
What's in a name? From the Greek word for hidden, kryptos.
Say what? Krypton is pronounced as KRIP-ton.
History and Uses:
Krypton was discovered on May 30, 1898 by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist, while studying liquefied air. Small amounts of liquid krypton remained behind after the more volatile components of liquid air had boiled away. The earth's atmosphere is about 0.0001% krypton.
The high cost of obtaining krypton from the air has limited its practical applications. Krypton is used in some types of photographic flashes used in high speed photography. Some fluorescent light bulbs are filled with a mixture of krypton and argon gases. Krypton gas is also combined with other gases to make luminous signs that glow with a greenish-yellow light. In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
Once thought to be completely inert, krypton is known to form a few compounds. Krypton difluoride (KrF2) is the easiest krypton compound to make and gram amounts of it have been produced.
For those that are curious, pictures of krypton gas and krypton plasma can be found in the Questions and Answers section of this site.
Estimated Crustal Abundance: 1×10-4 milligrams per kilogram
Estimated Oceanic Abundance: 2.1×10-4 milligrams per liter
Number of Stable Isotopes: 5 (View all isotope data)
Ionization Energy: 14.000 eV
Oxidation States: 0
Electron Shell Configuration: | 1s2 |
2s2 2p6 | |
3s2 3p6 3d10 | |
4s2 4p6 |
For questions about this page, please contact Steve Gagnon.
Atomic Number of Krypton is 36.
Chemical symbol for Krypton is Kr. Number of protons in Krypton is 36. Atomic weight of Krypton is 83.798 u or g/mol. Melting point of Krypton is -156,6 °C and its the boiling point is -152,3 °C.
» Boiling Point» Melting Point» Abundant» State at STP» Discovery YearAbout Krypton
The chemical element which became famous due to a famous comics about Superman (in the form of a mineral), krypton is an odorless and colorless gas. It is a so called noble gas which is very nonreactive and enters the reaction only with fluorine gas. The name of this chemical element comes from a Greek word meaning hidden. This gas was discovered quite recently and it is really very rare in our atmosphere. It has no biological importance. Krypton is used for making light, in light discharge and fluorescent lights. Krypton compound with fluorine is used in chemical industry and for producing lasers.
Uses of Krypton
Krypton, an odorless, tasteless, colorless gas with the symbol Kr, is used as a white light source in photography. And it is mostly used in energy-saving fluorescent lamps. Krypton is widely used for filling incandescent lamps. It can be also used in making luminous signs. Krypton difluoride, a compound of krypton and fluorine with the formula KrF2, is employed as an oxidative fluorinating agent. Furthermore, krpton can be employed in nuclear medicine, in nuclear fusion energy research, and in experimental particle physics.
Compounds with Krypton
- KrF2: Krypton difluoride
Properties of Krypton Element
| Atomic Number (Z) | 36 |
|---|---|
| Atomic Symbol | Kr |
| Group | 18 |
| Period | 4 |
| Atomic Weight | 83.798 u |
| Density | 0.003733 g/cm3 |
| Melting Point (K) | 115.79 K |
| Melting Point (℃) | -156,6 °C |
| Boiling Point (K) | 119.93 K |
| Boiling Point (℃) | -152,3 °C |
| Heat Capacity | 0.248 J/g · K |
| Abundance | 1×10−4 mg/kg |
| State at STP | Gas |
| Occurrence | Primordial |
| Description | Noble gas |
| Electronegativity (Pauling) χ | 3 |
| Ionization Energy (eV) | 13.99961 |
| Atomic Radius | 88pm |
| Covalent Radius | 110pm |
| Van der Waals Radius | 202 |
| Valence Electrons | 8 |
| Year of Discovery | 1898 |
| Discoverer | Ramsay and Travers |
What is the Boiling Point of Krypton?
Krypton boiling point is -152,3 °C. Boiling point of Krypton in Kelvin is 119.93 K.
What is the Melting Point of Krypton?
Krypton melting point is -156,6 °C. Melting point of Krypton in Kelvin is 115.79 K.
How Abundant is Krypton?
Krypton Outside Particles
Abundant value of Krypton is 1×10−4 mg/kg.
What is the State of Krypton at Standard Temperature and Pressure (STP)?
What Is Kr Atomic Number
State of Krypton is Gas at standard temperature and pressure at 0℃ and one atmosphere pressure.
When was Krypton Discovered?
Number Of Protons In Krypton
Krypton was discovered in 1898.
Krypton Atomic Structure