As the elements in Group 17 on the Periodic Table are considered from top to bottom what happens to the atomic radius and the metalic character ofeach successive element?

Answer 1

Atomic radii and metallic character both increase.

The reason the atomic radius always tends to increase from top to bottom in any group of the periodic table is because, with each new period, elements have electrons that occupy a new energy shell farther from the nucleus, and the nuclear force acting on these outer electrons decreases. This means that the positively-charged protons in the nucleus exert less of a "pull" on the outer electrons, which are farther from the nucleus.

From left to right, metallic character decreases because as atoms have more electrons in their outer shell, they are less likely to gain an electron than to give one up in order to complete a fully occupied valence shell. From top to bottom and from right to left on the periodic table, metallic character tends to increase, meaning that "metallic character" refers to the ability to give up electrons to become cationic. This is because, as previously mentioned, the electrons are farther from the nucleus, and the nucleus doesn't have enough of a "force" to keep the electrons in the atom's electron cloud, and they are pulled away more easily.

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Answer 2

Atomic radius increases, metallic character decreases.

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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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