10 Ne Neon 20,18 u

Neon

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Chu kỳ
2
Nhóm
18
Khối
p-khối
Pha (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.

Ngoại quan: 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.

Tính chất vật lý

Khối lượng nguyên tử 20.18 u
Mật độ 0.0008999 g/cm³
Điểm nóng chảy -248.6 °C
Điểm sôi -246.0 °C
Pha ở STP Gas
Bán kính nguyên tử 38.0 pm

Tính chất điện tử

Năng lượng ion hóa 2080.7 eV
Electron hóa trị 8

Cấu hình electron

Cấu hình [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

Khám phá

Được phát hiện bởi: William Ramsay
Năm: 1898

Khối & Chu kỳ

Khối

s p d f

Chu kỳ

1 2 3 4 5 6 7

Bảng tuần hoàn

Lanthanide Actinide

Thêm Khí Hiếm

2 He Helium 18 Ar Argon 36 Kr Krypton 54 Xe Xenon 86 Rn Radon

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 khí hiếm.
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.