'Atomic number 9, it's a trace element in the body, notably in the teeth'
fluorine
THE HUMAN ELEMENT: Atomic number 9, its a trace element in the body, notably in the teeth
Atomic number 9, it's a trace element in the body, notably in the teeth
Atomic number 9, it's a trace element in the body, notably in the teeth
THE HUMAN ELEMENT
fluorine
THE HUMAN ELEMENT