Why does ionization energy change on the periodic table?

Answer 1

Because the nuclear charge incrementally changes, and also shielding by other electrons periodically changes.

Two factors determine ionization energy: (i) nuclear charge; and (ii) shielding by other electrons. As nuclear charges increase with #Z#, the atomic number, ionization energies INCREASE, and atomic radii decrease. Clearly, this reflects the effect of electrostatic attraction. Incomplete electronic shells shield nuclear charge very imperfectly, and this imperfect shielding accounts for the periodicity of the elements.

You should examine the data and a table of ionization energies so that you can account for them in light of periodicity. Once a shell is filled, the nuclear charge is somewhat shielded, and electrons join a new valence shell, further removed from the nucleus.

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Answer 2

Ionization energy changes on the periodic table because it is influenced by factors such as atomic size, effective nuclear charge, and electron shielding. Generally, ionization energy increases across a period from left to right due to increasing effective nuclear charge, while it decreases down a group due to increasing atomic size and electron shielding.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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