9
F
Fluorine
Halogen period 2 group 17 p-block discovered: 1670
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 9
- Atomic mass
- 18.99840316 a.m.u.
- Electron configuration
- [He]2s2 2p5
- Electronegativity
- 3.98 on the Pauling scale
- Atomic radius
- 135 pm
- Ionization energy
- 17.423 eV
- Electron affinity
- 3.339 eV
- Oxidation states
- -1
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Gas
- Melting point
- 53.53 K (-219,62 °C)
- Boiling point
- 85.03 K (-188,12 °C)
- Density
- 0.001696 g/cm³
Materials about this element
-
7.1. Простые вещества
Book page
Лайнус Полинг, Питер Полинг - Химия
Водород очень широко распространенный элемент.