Fluorine
Element #9
Physical properties
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
Reactivity : Fluorine is the most reactive out of all of the elements in its family
Identifying Information
Mass number : 19
Protons : 9
Neutrons :10
Electrons : 9
Location on periodic table
History and Discovery
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
Isotopes: fluorine has 18 isotopes
Compounds: Sodium fluorine and sodium monofluorophosphate are all compounds of fluorine to create toothpaste