10 Ne Neon 20.18 u

Neon

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คาบ
2
หมู่
18
บล็อก
p-บล็อก
สถานะ (STP)
Gas

Neon is a noble gas known for its bright reddish-orange glow in neon signs. It is the fifth most abundant element in the universe.

ลักษณะ: Colorless gas (reddish-orange glow in discharge)

About Neon

Best known for the reddish-orange light it emits when electrified, neon is an inert noble gas of atomic number 10 and atomic mass 20.18. Its electrons completely fill the second shell ([He] 2s2 2p6), a closed configuration that leaves eight valence electrons, no tendency to bond, and a very high ionization energy of 2081 kJ/mol. The colorless gas liquefies at 27 K. William Ramsay discovered it in 1898. Though neon is the fifth most abundant element in the universe, it is scarce in Earth's air, and its characteristic glow in gas-discharge tubes became the basis of illuminated signage. Neon sits in group 18, period 2.

คุณสมบัติทางกายภาพ

มวลอะตอม 20.18 u
ความหนาแน่น 0.0008999 g/cm³
จุดหลอมเหลว -248.6 °C
จุดเดือด -246.0 °C
สถานะที่ STP Gas
รัศมีอะตอม 38.0 pm

คุณสมบัติทางอิเล็กทรอนิกส์

พลังงานไอออไนเซชัน 2080.7 eV
อิเล็กตรอนวาเลนซ์ 8

การจัดเรียงอิเล็กตรอน

การกำหนดค่า [He] 2s² 2p⁶

Electron Shell Configuration

Neon electron shell configuration Ne 2e⁻ 8e⁻
Electron shell structure of Neon — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8

Position in Periodic Table

Neon position in the periodic table Ne

การค้นพบ

ค้นพบโดย: William Ramsay
ปี: 1898

Frequently Asked Questions

What is Neon?
Neon (Ne) is a chemical element with atomic number 10. It is a gas at standard temperature and pressure, classified as a แก๊สมีตระกูล.
What are the key properties of Neon?
Neon has an atomic mass of 20.18 u, density of 0.0008999 g/cm³, melting point of -248.6°C, boiling point of -246.0°C.
What is the electron configuration of Neon?
The electron configuration of Neon is [He] 2s2 2p6. It is in the p-block of the periodic table.
Who discovered Neon?
Neon was discovered by William Ramsay in 1898.