for each compound below, draw two chair conformations. indicate whether the substituents are axial or equatorial. indicate which chair conformation is more stable.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.