'Borax, used as a water softener, is a compound of this lightweight, brownish element'
Boron
THE ELEMENTS: Borax, used as a water softener, is a compound of this lightweight, brownish element
Borax, used as a water softener, is a compound of this lightweight, brownish element
Borax, used as a water softener, is a compound of this lightweight, brownish element
THE ELEMENTS
Boron
THE ELEMENTS