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As the size of an atom increases, the energy needed to remove an electron decreases.

As the size of an atom increases, the atomic radius increases: the distance between the nucleus and the outer electron shell becomes greater. This means that the positive nuclear charge has less of an effect on the negatively charged electron, so the attractive force between the nucleus and the electron is weaker. Less energy is required to overcome the weaker force.

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13y ago
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6y ago

It's rather the other way round. The more electrons and protons (and neutrons) there are, the heavier the atom.

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Q: How does the size of the atom affect the energy needed to remove an electron?
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What is ionization energy needed for?

There is an attraction of the nucleus for electrons. This attractive force must be overcome to remove an electron. The energy to overcome this attraction and remove an electron from the atom is 'ionization energy'.


What energy is required to remove an electron from an atom?

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What best defines the ionization energy of an element?

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What is the energy needed to remove an electron from a negative ion to form a neutral atom or molecule?

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The energy needed to remove an electron from an atom generally increases, decrease as you go across a period? Explain why ? please


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The energy required to remove an electron~ Apex! :D


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Why is the ionization energy needed to remove the first two electrons from Magnesium atoms relatively low?

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What do we mean by the first second and third ionization energies for a particular atom?

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