The closest-packing of spheres (such as oranges, cannonballs, or atoms) has the spheres ________
A)arranged in layers with each sphere surrounded by 4 other spheres in the layer.
B)arranged in layers with each sphere surrounded by 3 other spheres in the layer.
C)arranged in a square pattern with a sphere at each corner and one in the center of the square.
D)arranged in a square pattern with a sphere at each corner of the square.
E)arranged in layers with each sphere surrounded by 6 other spheres in the layer.

Question

Quizplus · Accepted Answer

The closest-packing of spheres is achieved by arranging the spheres in layers with each sphere surrounded by 6 other spheres in the layer. This arrangement is sometimes referred to as a hexagonal close-packed (HCP) structure, as the centers of the spheres in one layer are arranged in a regular hexagonal pattern, with each sphere touching 6 others in the same layer, and each sphere in the layer above and below touching 3 spheres in the layer beneath/above. This arrangement maximizes the use of space and minimizes the amount of empty space between the spheres.

The Closest-Packing of Spheres (Such as Oranges, Cannonballs, or Atoms)