Calculate the average atomic mass of a sample of antimony that is 57.21% antimony-121 (120.938 amu) and 47.79% antimony-123 (122.904 amu).

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

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

bcde is the incorrect answer it is a

i dont know the answe