Question : Soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is:
Option 1: Cerium
Option 2: cesium
Option 3: Calcium
Option 4: califonrium
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Correct Answer: cesium
Solution : The correct optin is - cesium.
Cesium is often used in ultra-precise atomic clocks. Among alkali metals, cesium has the lowest ionization energy and a melting point of 38.4 °C. As a result, it may fully demonstrate the photoelectric effect.
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