Which of the following metal atom loses electron most easily?

Potassium

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Sodium

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Zinc

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None of the above

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Solution

The correct option is A
Potassium

Based on the ease with which metal atoms lose electrons to form positively charged ions , the various metals are arranged in a series known as metal reactivity series and The metal whose atoms lose electron most easily is placed at the top of the series while the one that ionizes least readily is placed at the bottom. Therefore, the correct answer is Potassium that is at the top of activity series.

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