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the number of energy levels increases

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June Douglas

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1y ago
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10y ago

As you go down a group on the Periodic Table, atoms increase in size because additional electron shells are being occupied, which are further from the nucleus.

Due to the shielding effect from electron shells beneath the outermost shell (between it and the nucleus), there is an additional electron-to-electron repulsion factor that is included in the determination of the combined, effective attraction/repulsion of outermost electrons from the nucleus.

As such, as more electron shells are added, and more of a shielding effect is "felt" by outermost electrons, they move further from the nucleus in terms of relative position, and atomic radius increases.

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9y ago

The best reason that the atomic radius generally increases with atomic number in each group of elements is that the valence electrons are in a higher principle energy level so they sit farther away than the last energy level.

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13y ago

The atomic size is mostly determined by the outer electrons. As you go down the periodic table, atoms have more electrons and more energy levels.

As the (atomic number) increases (down the table), there is a corresponding increase in mass and volume (number of particles electrons, protons, neutrons). This requires a larger space to accommodate the increased volume of the atoms.

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12y ago

Atomic radius increases as you go down a group, which is a vertical column of the Periodic Table, because the number of electron shells increases.

As you go across a period from left to right, the filling of electron shells decreases the atomic radius until a shell is filled, so the radii are generally smallest to the right side of the period.

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13y ago

Both trends hold for both positive and negative ions.

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14y ago

When the valence level fills up, a new level is made a bit further from the nucleus. This trend on the periodic table increases as you go down the groups.

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13y ago

The sizes of the elements increase as you move down a group thus radii increase as well

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13y ago

the number of energy levels increases

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Dat One Sheep

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3y ago

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Q: Why does the atomic radius usually increase with the increase in atomic numbers within a group?
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Related questions

When atoms gains electrons what happens to the atomic radius?

The negative ionic radius is larger than the neutral atomic radius


How does the atomic radius increase or decrease horizontally on the periodic table?

Atomic radius decreases horizontally in periodic table. This is due to increase in nuclear charge.


What property increases going down the periodic table?

Your question is incorrect. It should be increases rather than decreases. Well it is the proton number (Z) that increases.


What is the Group trend Atomic radius?

Atomic radius increases down the group. This is because of the increase in number of shells.


What accompanies an increase in atomic number within a specific period?

An increase in atomic number would be accompanied by a decrease in radius, and an increase in electronegativity.


What happens to the size of the atomic radius as you go down the noble gas family?

The atomic radius increase down, from helium to radon.


In general the atomic radius of an atom as you move down a column in the periodic table?

Decreases. Look at the images under atomic radius, on wikipedia.


What properties increase down the periodic table?

Atomic Mass


Does atomic radius increase from top to bottom in a group?

Yes


What is the relationship of ionic radius and atomic number?

They both increase


An increase in the atomic number the atomic radius moving from left to right across a period.?

decreases


Why does the atomic radius change as electrons are added to a shell?

This is because of the fact atomic radius is the distance of the outermost electron to the nucleus thus as more electrons are added the distance increase (which cause atomic radius to change)