Julie and Devon are modeling how the Sun heats the Earth. Julie hangs a sheet of graph paper on a wall. Devon holds a flashlight and shines it in a straight line toward the graph paper while Julie dims the lights in the classroom. The diagram shows their model of the Sun heating the Earth at the
equator
How can the students change their model to represent how the Sun heats the Earth in places where the climate is cold all year?

Alpha particles have positive charge, beta particles have negative charge, and answer 4 just doesn’t make sense. thus, you are left with only one possible answer.

The answers is a nuclear changes

Answer : option a) 84explanation :

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.

Ithink it’s carbon dioxide