how do the atomic radius change as you go from left to right in a period
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As a result, the atomic radius decreases. ... Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius.
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Atomic radius decreases across a period, since the force of proton on electron increases as whole, and also the shells do not increase.
For the inert elements (noble gases), atomic radius increases due to repulsion among the electrons, since the shells are fully filled. But repulsion does not mean that inert gases become less stable in any way whatsoever; they still are "inert".
For the inert elements (noble gases), atomic radius increases due to repulsion among the electrons, since the shells are fully filled. But repulsion does not mean that inert gases become less stable in any way whatsoever; they still are "inert".
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