How does electronegativity change from top to bottom?

Answer 1

Electronegativity DECREASES down a Group but INCREASES across a Period (from left to right).

Elements to the right of the Periodic Table are the most electronegative; for examples, consider the electronegativities of nitrogen, oxygen, and fluorine. Electronegativity is defined as an atom's capacity to polarize electron density towards itself within an element, excluding noble gases.

Down a Group, while nuclear charge, #Z#, has increased, the nuclear charge is shielded by full electron shells, and electronegativity necessarily decreases.
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Answer 2

Electronegativity generally decreases as you move down a group on the periodic table. This is because the atomic size increases, leading to a decrease in the effective nuclear charge experienced by the valence electrons.

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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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