Question

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Which element would experience the greatest energy loss when a neutral atom in the gaseous phase gains one additional electron?

Li, Kr, F, Cs,Cl​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Fluorine

Explanation:

This question refers to electron affinity, which is defined as the energy given off when a neutral atom in the gas phase gains an extra electron.

X(g)+e−→X−(g)+energy

Electron affinity increases for elements towards the top and right of the periodic table, so the elements in the top right lose the most energy when gaining an electron. Another way of thinking is that they lose energy, but gain stability. Of the available answers, the element to the most upper right of the periodic table is fluorine.