36 Kr Krypton 83.798 u

Krypton

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คาบ
4
หมู่
18
บล็อก
p-บล็อก
สถานะ (STP)
Gas

Krypton is a noble gas used in certain fluorescent lamps and photographic flashes. Its spectral lines were once used to define the meter.

ลักษณะ: Colorless gas, white solid

About Krypton

A colorless noble gas discovered by William Ramsay in 1898, krypton fills atomic number 36 with an atomic mass of 83.798. Its outer shell is complete ([Ar] 3d10 4s2 4p6), giving eight valence electrons and, unusually for a noble gas, a measurable electronegativity of 3.00 alongside a first ionization energy of 1351 kJ/mol; it condenses at 120 K. Krypton is used in certain fluorescent lamps and photographic flashes, and its sharp spectral lines were once used to define the meter. The gas belongs to group 18, period 4, among the noble gases.

คุณสมบัติทางกายภาพ

มวลอะตอม 83.798 u
ความหนาแน่น 0.003749 g/cm³
จุดหลอมเหลว -157.4 °C
จุดเดือด -153.2 °C
สถานะที่ STP Gas
รัศมีอะตอม 88.0 pm

คุณสมบัติทางอิเล็กทรอนิกส์

อิเล็กโทรเนกาติวิตี 3.0
พลังงานไอออไนเซชัน 1350.8 eV
อิเล็กตรอนวาเลนซ์ 8

การจัดเรียงอิเล็กตรอน

การกำหนดค่า [Ar] 3d¹⁰ 4s² 4p⁶

Electron Shell Configuration

Krypton electron shell configuration Kr 2e⁻ 8e⁻ 18e⁻ 8e⁻
Electron shell structure of Krypton — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 8

Position in Periodic Table

Krypton position in the periodic table Kr

การค้นพบ

ค้นพบโดย: William Ramsay
ปี: 1898

Frequently Asked Questions

What is Krypton?
Krypton (Kr) is a chemical element with atomic number 36. It is a gas at standard temperature and pressure, classified as a แก๊สมีตระกูล.
What are the key properties of Krypton?
Krypton has an atomic mass of 83.798 u, density of 0.003749 g/cm³, melting point of -157.4°C, boiling point of -153.2°C.
What is the electron configuration of Krypton?
The electron configuration of Krypton is [Ar] 3d10 4s2 4p6. It is in the p-block of the periodic table.
Who discovered Krypton?
Krypton was discovered by William Ramsay in 1898.
What is the electronegativity of Krypton?
Krypton has an electronegativity of 3.0 on the Pauling scale.