Atomic Radius
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5 Terms
1
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What is the definition of atomic radius?
Half the distance between the nuclei of two identical atoms bonded together.
2
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How does atomic radius change across a period?
It increases from right to left across a period.
3
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Why does atomic radius increase from right to left across a period?
The number of protons decreases, weakening the nuclear attraction and allowing electron shells to be farther from the nucleus.
4
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How does atomic radius change down a group?
It increases going down a group.
5
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Why does atomic radius increase going down a group?
The number of electron shells increases, placing the outermost electrons farther from the nucleus.