What is a key property of crystals?

Crystals differ in physical properties, i.e., in hardness, cleavage, optical properties, heat conductivity, and electrical conductivity.

These properties are important since they sometimes determine the use to which the crystals are put in industry.

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A crystals key properties are hardness, cleavage, optical properties, heat conductivity, and electrical conductivity.

Explanation:

These properties are important since they sometimes determine the use to which the crystals are put in industry.

a graduated cylinder.

explanation:

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.