Aerosol can carry warnings on their labels that say not to incinerate (burn) them or store the cans above a certain temperature. The gas in a used aerosol can is at a pressure of 98 kPA at 20°C. If the can is thrown into a fire, what will the pressure be when the temperature reaches 790°C?

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

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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.