Question

One two and three dimensional close packed structure

Answer 1

One Dimensional Structure

=> when it has only length

Two Dimensional Structure

=> when it has length and breadth

Three Dimensional Structure

=> when it has length, breadth, height

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Answer 2

$\huge{ \underline{\mathfrak{ \blue{ᴀɴѕᴡᴇʀ....{ \heartsuit}}}}}$

Close Packing in One Dimension:

In this arrangement, each sphere is in contact with two of its neighbours. The number of nearest neighbours of a particle is called its coordination number. Thus, in a one-dimensional close-packed arrangement, the coordination number is 2.