Help me please.
Thermal energy can come from other forms of energy. Give several examples how.

a heater turns electrical energy into thermal energy

the sun turns gas into thermal energy

annd i cant think of anymore but i hope this helps you

a polar bond is formed when electrons are shared unevenly between atoms

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.