9 F Fluorine 18,998 u

Fluorine

Add one script tag to your page:

<div data-chemfyi="element" data-slug="F"></div>
<script src="https://cdn.jsdelivr.net/npm/chemfyi-embed@1/dist/embed.min.js" defer></script>

Embed as an iframe:

<iframe src="https://chemfyi.com/iframe/element/F/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>

Paste the URL in WordPress, Medium, or Ghost:

https://chemfyi.com/ru/element/f/

Shields.io-compatible SVG badge:

Fluorine badge ![Fluorine](https://chemfyi.com/badge/element/F.svg)

Web Component:

<chemfyi-element slug="F"></chemfyi-element>
<script src="https://cdn.jsdelivr.net/npm/chemfyi-embed@1/dist/embed.min.js" defer></script>
Период
2
Группа
17
Блок
p-Блок
Фаза (СТУ)
Gas

Fluorine is the most electronegative and reactive of all elements. It is used in toothpaste, Teflon, and refrigerants.

Внешний вид: Pale yellow gas

About Fluorine

No element is more electronegative or more chemically aggressive than fluorine, which tops the electronegativity scale at 3.98 and reacts with almost every other substance. It is a pale yellow halogen of atomic number 9 and atomic mass 18.998, existing as a gas that condenses at 85 K. Seven valence electrons ([He] 2s2 2p5) leave it one short of a filled shell, driving a strong pull on electrons and a first ionization energy of 1681 kJ/mol. Henri Moissan first isolated the reactive element in 1886, a feat that had defeated earlier chemists. Fluorine and its compounds appear in toothpaste, in the polymer Teflon, and in refrigerants. It heads group 17, period 2.

Физические свойства

Атомная масса 18.998 u
Плотность 0.001696 g/cm³
Температура плавления -219.7 °C
Температура кипения -188.1 °C
Фаза при СТУ Gas
Атомный радиус 64.0 pm

Электронные свойства

Электроотрицательность 3.98
Энергия ионизации 1681.0 eV
Сродство к электрону 328.0 eV
Валентные электроны 7

Электронная конфигурация

Конфигурация [He] 2s² 2p⁵

Electron Shell Configuration

Fluorine electron shell configuration F 2e⁻ 7e⁻
Electron shell structure of Fluorine — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 7

Position in Periodic Table

Fluorine position in the periodic table F

Открытие

Открыт: Henri Moissan
Год: 1886

Блок и период

Блок

s p d f

Период

1 2 3 4 5 6 7

Периодическая таблица

Лантаниды Актиниды

Реакции с F

Positron Emission of Fluorine-18 (PET Scan)

¹⁸F → ¹⁸O + e⁺ + νₑ

Nuclear

Fluorine Displacing Chlorine from Sodium Chloride

F₂ + 2NaCl → 2NaF + Cl₂

Single Replacement

Hydrofluoric Acid and Sodium Hydroxide

HF + NaOH → NaF + H₂O

Acid-Base

Sodium Fluoride and Calcium Chloride

2NaF + CaCl₂ → CaF₂ + 2NaCl

Double Replacement

Calcium Fluoride Precipitation (Fluorite)

CaCl₂ + 2NaF → CaF₂↓ + 2NaCl

Precipitation

Compounds Containing Fluorine

Hydrofluoric Acid

HF

Sodium Fluoride

NaF

Boron Trifluoride

BF₃

Lithium Fluoride

LiF

Sulfur Hexafluoride

SF₆

Xenon Difluoride

XeF₂

Nitrogen Trifluoride

NF₃

Atorvastatin

C₃₃H₃₅FN₂O₅

Sodium Hexafluorophosphate

NaPF₆

Freon-12

CCl₂F₂

Calcium Fluoride

CaF₂

Больше Галоген

17 Cl Chlorine 35 Br Bromine 53 I Iodine 85 At Astatine

Explore on Science FYI

MineralFYI
Fluorite

Primary fluorine mineral (CaF₂)

Frequently Asked Questions

What is Fluorine?
Fluorine (F) is a chemical element with atomic number 9. It is a gas at standard temperature and pressure, classified as a галоген.
What are the key properties of Fluorine?
Fluorine has an atomic mass of 18.998 u, density of 0.001696 g/cm³, melting point of -219.7°C, boiling point of -188.1°C.
What is the electron configuration of Fluorine?
The electron configuration of Fluorine is [He] 2s2 2p5. It is in the p-block of the periodic table.
Who discovered Fluorine?
Fluorine was discovered by Henri Moissan in 1886.
What is the electronegativity of Fluorine?
Fluorine has an electronegativity of 3.98 on the Pauling scale.