36 Kr 83.798
Krypton
noble gas
Properties
- Atomic number
- 36
- Atomic mass
- 83.798 u
- Category
- noble gas
- Group
- 18
- Period
- 4
- Block
- p-block
- State (room temp)
- Gas
- Outer-shell electrons
- 8
- Electronegativity
- 3 (Pauling)
- Density
- -
- Melting point
- -157.37 °C
- Boiling point
- -153.22 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶
Noble-gas shorthand: [Ar] 3d¹⁰ 4s² 4p⁶
Electrons per shell: 2, 8, 18, 8, which is 8 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Krypton
Krypton (from Greek:κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquefied air, and is often used with other rare gases in fluorescent lamps.
- Discovered by William Ramsay
- Appearance: colorless gas, exhibiting a whitish glow in a high electric field
Krypton: frequently asked questions
- What is Krypton?
- Krypton (Kr) is the chemical element with atomic number 36. It is a nonmetal: specifically a noble gas, the group with full outer electron shells.
- What is the atomic number of Krypton?
- Krypton's atomic number is 36, which means every Krypton atom has 36 protons in its nucleus.
- What is the electron configuration of Krypton?
- The electron configuration of Krypton is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 (noble-gas shorthand: [Ar] 3d10 4s2 4p6). Its electrons are arranged in shells of 2, 8, 18, 8, with 8 in the outermost shell.
- Is Krypton a metal or a nonmetal?
- Krypton is a nonmetal: specifically a noble gas, the group with full outer electron shells.
- What group and period is Krypton in?
- Krypton is in group 18 and period 4 of the periodic table.
- Is Krypton a solid, liquid, or gas?
- At room temperature, Krypton is a gas.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.