No. Fluorine is a nonmetal, classified as a halogen on the periodic table.

How many protons does fluorine have?

Fluorine has 9 protons. Its atomic number is 9, which is also the number of electrons in a neutral atom of fluorine.

What group and period is fluorine in?

Fluorine is in group 17 and period 2 of the periodic table, in the p-block.

What is the atomic mass of fluorine?

The atomic mass of fluorine is 18.998 u (unified atomic mass units).

Element 9

Fluorine (F)

Halogen · Period 2 · Group 17 · p-block

Fluorine (F) is element 9 of the periodic table, a halogen in period 2, group 17 (p-block) with an atomic mass of 18.998 and is a gas at standard conditions.

At a glance

Atomic number: 9
Symbol: F
Atomic mass: 18.998 u
Category: Halogens
Period: 2
Group: 17
Block: p-block
Phase at STP: gas

Electron structure

Electron configuration: 1s2 2s2 2p5
Shorthand configuration: [He] 2s2 2p5
Electrons per shell: 2, 7
Oxidation states: -1

Physical properties

Melting point: 53.53 K (-219.62 °C)
Boiling point: 85.03 K (-188.12 °C)
Density: 0.001696 g/cm³
Phase: gas

Atomic properties

Electronegativity (Pauling): 3.98
Atomic radius: 42 pm
Covalent radius: 57 pm
Van der Waals radius: 147 pm
First ionization energy: 1681 kJ/mol
Electron affinity: 328 kJ/mol

Notable isotopes

Notable isotopes of Fluorine: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
F-19	18.9984	100%	Stable

Common uses

Toothpaste
Teflon
Refrigerants
Uranium enrichment

Discovery

Year: 1886
Discovered by: Henri Moissan
Country: France

Frequently asked questions

Is fluorine a metal?: No. Fluorine is a nonmetal, classified as a halogen on the periodic table.
How many protons does fluorine have?: Fluorine has 9 protons. Its atomic number is 9, which is also the number of electrons in a neutral atom of fluorine.
What group and period is fluorine in?: Fluorine is in group 17 and period 2 of the periodic table, in the p-block.
What is the atomic mass of fluorine?: The atomic mass of fluorine is 18.998 u (unified atomic mass units).

Keep exploring

Fluorine's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.