Isopo kemika ni ifamora laarin awon atomu to gba aaye ida awon kemika ti won ni atomu meji tabi meta.. 
Robyn Rihanna Fenty (Bii ojo ogun odun 1988) ti won mo si oruko itage re RhiAnna ( ​ Or , ti o jẹyọ lati Rhiannon to je oruko ni ede Welsh.) je alágbe, osere ati eléso aṣọ omo orile ede Barbados.. 