Check the three scenarios that have balanced forces. Nur is ice skating and glides across the ice in a straight line and a constant speed,
Malik throws a baseball from first base to second,
A tow truck tries and fails to pull a car out of a ditch. Neither the car nor the tow truck move.
Samya and Jordan run into each other in bumper cars. They bounce off each other and go in new directions
Qamar rests at the top of Stone Mountain and enjoys the view.

a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity

explanation:

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.