Electrons exist only at fixed levels of potential energy. however, if an atom absorbs sufficient energy, a possible result is that

Answer;

-An electron may move to an electron shell farther away from the nucleus.

Explanation;

-Kinetic and potential energy of atoms result from the motion of electrons. When electrons are excited they move to a higher energy orbital farther away from the atom. The further the orbital is from the nucleus, the higher the potential energy of an electron at that energy level.

-When the electron returns to a low energy state, it releases the potential energy in the form of kinetic energy.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )