9.2 Addition of Hydrogen Halides to alkenes Markovnikoy' s rule(马氏规则) What is it Mar's Rule?-----The addition of hx to an alkenes, the hydrogen atom adds to the carbon atom of the double bond that already has the greater number of hydrogen atoms9.2 Addition of Hydrogen Halides to Alkenes: Markovnikov’s Rule (马氏规则） What is it Mar’s Rule?-----The addition of HX to an alkenes, the hydrogen atom adds to the carbon atom of the double bond that already has the greater number of hydrogen atoms