What is electron affinity , explain it's trend in groups and periods.

1.	What is electron affinity , explain it's trend in groups and periods.
Answer» ANSWER: Explanation: The electron affinity of an atom or molecule is DEFINED as the amount of energy RELEASED when an electron is attached to a NEUTRAL atom or molecule in the gaseous state to FORM a negative ion.

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Explanation:

The electron affinity of an atom or molecule is DEFINED as the amount of energy RELEASED when an electron is attached to a NEUTRAL atom or molecule in the gaseous state to FORM a negative ion.

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What is electron affinity , explain it's trend in groups and periods. ​

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What is electron affinity , explain it's trend in groups and periods.