Page 23 - E-Science Prep.2 2024-2025 t1 Unit1_Neat

Properties of elements and their uses:

Element Uses
1- sodium Liquid sodium is used in transferring heat from
( 11) inside the nuclear reactor.

2- cobalt It’s used in food preservation bec. it emits gamma
(60 27) rays which kill microbes.

3- It’s used in manufacture of electronic devices
silicon (computer) bec. it’s a semiconductor which
( 14) conducts electricity depending on temperature.

4- It’s used in preservation of cornea of eye bec. it
liquefied has very low boiling point ( - 196)
nitrogen

2nd Prep. First Term 2 23
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