nalyze the map below and answer the question that follows. A topographic map of mainland Southeast Asia. three lines are labeled A, B, and C. Line A goes through Burma. Line B starts in the Middle of Thailand and ends in Bangkok. Line C goes through Laos, Thailand, and Cambodia to the coastline. Image courtesy of the CIA World Factbook The lines marked by the letters A, B, and C on the map above represent . A. chains of volcanoes B. earthquake fault lines C. thin strips of heavy forests D. major rivers that flow from north to south Please select the best answer from the choices provided A B C D

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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.