Fluorine

Element #9

Physical properties

Atomic mass: estimated to 19

Atomic Radius in picometers: 42 pm

Density: 0.001696

Melting point :-219.6 Celsius

Boiling point : -188.1 Celsius

At room temperature : solid

Appearance : gas /very pale yellow Liquid/bright yellow Solid /alpha is opaque,beta is transparent

Hardness:2.5MPa

Chemical Properties

Flammability: Fluorine is a pale yellow ,diatomic, highly corrosive flammable gas

Reactivity : Fluorine is the most reactive out of all of the elements in its family

Identifying Information

Atomic number : 9

Mass number : 19

Protons : 9

Neutrons :10

Electrons : 9

Location on periodic table

Fluorine is located on the top right second row 5th element of 6 on its row is labeled as "F" and has the number 9 over it for its atomic number

History and Discovery

When: Fluorine was discovered in 1886

Where: fluorine was discovered in France

Who : Fluorine was discovered by a chemist named Henri Moissan

How: Henri was collecting gas by passing an electric current through on of its compounds , hydrogen fluoride

Applications and uses

In what ways is fluorine used ? Fluorine is mostly used in toothpaste and is used in water to prevent dental cavities

Isotopes: fluorine has 18 isotopes

Compounds: Sodium fluorine and sodium monofluorophosphate are all compounds of fluorine to create toothpaste