Sise daadaa julo re waye nibi ayo Australian Open ti odun 2015, nibiti o ti fidi eni to daa julo lagbaye remi, Ana Ivanovic nibi a tii wo ipele keta ayo naa.. 
isopọ̀ ajofagbáradìmú (covalent Bond) ní ìjipọ̀ kẹ́míkà tó jẹ mọ́ ijopo elègbò méjì méjìrin àwọn átọ́kasí kẹ́míkà.. 