Which of the following statements is the best explanation for why the embryos look so similar, considering how different an adult fish and pig are? Fish and pigs both need gills. Fish and pigs are both mammals. Fish and pigs share a common ancestor.

answer; economic order quantity;

so what is the problem with your lab report and whats the subject of the lab report? i will you

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.