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The amount of energy released when an electron is attached to a neutral atom or molecule (while it is in it's gaseous state) in order to form a negative ion.  - Lacie

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- Lacie

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Electron Affinity happens because the electrons added energy levels become closer to the nucleus. So a stronger attraction between the nucleus and its electrons happen.

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Electron affinity is the amount of energy released

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Electrons is added to the energy levels so it can be closer to the nucleus which makes a stronger appeal between the nucleus and the electron

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As the quantum number increases, the size of the orbital also increases. Making the affinity for the electron less.

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It increases Upward , then from left to right across the periods

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The increased nuclear charge happens as you go down. Because of this the group is offset by extra screening electrons.

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Increase nuclear charge across the period and up a group

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Electron affinity is the released energy when an electron attaches to a neutral atom or molecule in the gaseous state which then forms a negative ion.

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The electrons added energy levels go closer to the nucleus, which creates a stronger attraction between the electrons and the nucleus.

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It increases due to the electrons added energy levels going closer to the nucleus.

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It increases due to the electrons added energy levels going closer to the nucleus.

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electron affinity is the amount of energy released when an electron is added to an atom

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this happens so the electron can be closer to the nucleus which makes a stronger attraction

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it increases across the trend

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it decreases going down

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is the amount of energy required to detach one electron from a negatively charged ion of an atom or molecule.

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reflects the ability of an atom to accept an electron. It is the energy change that occurs when an electron is added to a gaseous atom.

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it increases

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it decreases