At a deph of 10 kilometers what would the temperature be ?

200 degree C

Explanation:

The heat is apparent from the increase in temperature of the earth with increasing depth below the surface. Although higher and lower temperature occurs, the average temperature at depth of 10 km is about 200 degree C.

PLS MARK AS BRAINLIEST

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.