In alpha decay, alpha particles are ejected from the nucleus. which equation represents alpha decay? superscript 241 subscript 95 upper a m right arrow superscript 237 subscript 93 upper n p plus superscript 4 subscript 2 upper h e. superscript 18 subscript 9 upper f right arrow superscript 18 subscript 8 upper o plus subscript 0 subscript 1 e. superscript 14 subscript 6 upper c right arrow superscript 14 subscript 7 upper n plus superscript 0 subscript negative 1 e. superscript 152 subscript 66 upper d y right arrow superscript 152 subscript 66 upper d y plus y.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

the answer is d.) potassium