Ne
Neon is a noble gas famous for the bright reddish-orange light it emits in discharge tubes.
Physical Properties
| الكتلة الذرية | 20.18 u |
| الكثافة | 0.0008999 g/cm³ |
| Melting Point | 24.56 K |
| نقطة الغليان | 27.07 K |
| المظهر | Colorless gas, reddish-orange glow in discharge |
| State at Room Temp | Gas |
الخواص الكيميائية
| طاقة التأين الأولى | 2080.7 kJ/mol |
| القرب الإلكتروني | -116.0 kJ/mol |
| Oxidation States | 0 |
الخصائص الذرية
| تشكيل الإلكترون | [He] 2s2 2p6 |
| نصف قطر الذرة | 38.0 pm |
| نصف قطر التكافؤ | 58.0 pm |
| Van der Waals Radius | 154.0 pm |
اكتشاف
| اكتشفها | William Ramsay, Morris Travers |
| سنة الاكتشاف | 1898 |
| الموقع | London, England |
| Named After | Greek 'neos' meaning new |
عن Neon
Neon is a colorless, inert noble gas that gives a distinctive reddish-orange glow in vacuum discharge tubes. It is the fifth most abundant element in the universe but rare on Earth. Neon has no true chemical compounds and has the narrowest liquid range of any element.
Uses & Applications
Neon signs and lighting, high-voltage indicators, helium-neon lasers, and cryogenic refrigeration.
حقيقة مضحكة
Although we call all colorful gas-discharge tube signs 'neon signs,' only the red-orange ones actually contain neon; other colors use different gases.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 20 | 0.9048% | - | Yes |
| 21 | 0.0027% | - | Yes |
| 22 | 0.0925% | - | Yes |
تشكيل الإلكترون
[He] 2s2 2p6