Based on Reference Table N, what is the fraction of a sample of potassium-42 that will remain unchanged after 62.0 hours?

oh it is true if thats what you are asking

where is the following

explanation:

it's c. elements are placed in rows based on how may valencies electrons have.

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