SKT3013 - CLOSED-PACKED STRUCTURE

The first layer of closed-packing structure also known as

• hexagonal coordination

• sphere coordination

• spaces coordination

• hexagonal coordination of each sphere

These two pictures show examples of closed-packed structures. Is it true or false ?

• True

• False

Tags

NGSS.HS-PS1-3

What is the most efficient arrangement of spheres in close packed structure

• random arrangement

• square coordination

• • hexagonal coordination

• triangular coordination

In a close packed structure , how are the spheres placed in the second layer ?

• in the same positions as the first layer

• randomly

• in the indentations left by the first layer

• in a separate layer above the first layer

What is the characteristic of the space between layers in a close packed structure ?

• completely filled by spheres

• Empty with no trapped space

• trapped is not filled by the spheres

the third layer of closed-packed structure can be divided by two which is

• ABA hexagonal close packing

• ABA cubic close packing

• ABC cubic close packing

• CBA hexagonal close packing

Which type of structure has a sphere at the center of a cube with spheres at each corner ?

• Primitive cubic structure ( scc )

• Body-centered cube ( bcc )

• Face-centered cubic cell

• Hexagonal close-packed structure

What is the example of ABA hexanol-closed packing (HCP) ? (choose two)

• Magnesium, Mg

• Aluminum, Al

• Silver, Ag

• Zinc, Zn

Tags

NGSS.HS-PS1-3

Closed-packed structure means there is .......... waste of space

All noble gases except Helium, He is

• ABA hexagonal close packing

• ABA cubic close packing

• ABC cubic close packing

• CBA hexagonal close packing