What is meant atomic radius? Explain why it decreases across a period?
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The atomic radius of a chemical element is a measure of the size of itsatoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons.
Dragonking:
What about the sub question
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ANSWER OF THE SECOND PART OF Q.
There is a strong force of attraction that pulls the electrons close to nucleus that leads to smaller atomic radius.
There is a strong force of attraction that pulls the electrons close to nucleus that leads to smaller atomic radius.
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