What is characteristic of amorphous solids? Question 11 options: They have a short-range order but lack long-range order They have a repeating crystal lattice They have a definite geometric shape

To answer the question step by step:

1. Identify the characteristics of amorphous solids:

   • Amorphous solids are known for their lack of a long-range order. This means that, unlike crystalline solids, they do not have a repeating pattern that extends throughout the material.
   • They do, however, exhibit short-range order, meaning that atoms or molecules are arranged in a somewhat orderly fashion over short distances.

2. Evaluate the given options:

   • Option 1: "They have a short-range order but lack long-range order."
     • This accurately describes amorphous solids, as they do not have a repeating crystal lattice and lack long-range order.
   • Option 2: "They have a repeating crystal lattice."
     • This describes crystalline solids, not amorphous solids.
   • Option 3: "They have a definite geometric shape."
     • This is also a characteristic of crystalline solids, which have a well-defined geometric shape due to their long-range order.

3. Conclusion:

   • The correct option is: "They have a short-range order but lack long-range order."

Therefore, the answer is:

Option 1: They have a short-range order but lack long-range order