The copper and oxygen and oxygen atoms are not ions, and the bonds are more covalent than they are ionic.
normal force because it is perpendicular to the surface
The magnitude of Alioth ( the brightest star in the big dipper ) is 1.76 and it is about 81 light years distant from Earth.
Answer:
The first answer is W and Z, since they appear to be a period apart. Dont know the second question. I did what I could, hope someone can answer the second.
Deffinitly oxygen cause everyone breathes and yah.
