What is atomic radius property in periodic table and why?
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the atomic radius may be visualised as the distance from the center of the nucleus and the outer most shell is isolated atom.the atomic radius decrease in moving from left to right along the period.this is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.the atomic radius increase down the group this is because new Shells are being added as we go down the group
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atomic radius decreases across a period and increases down a group
reason: in a period all the electrons are added to the same shell and also protons are added to the nucleus, this way the nucleus holds the electrons strongly and pulls the shells towards it hence decreasing its size wheras down a group, number of shells increases and electron shielding prevents the outer electrons from being attracted by the nucleus and the resulting atomic size is very large
reason: in a period all the electrons are added to the same shell and also protons are added to the nucleus, this way the nucleus holds the electrons strongly and pulls the shells towards it hence decreasing its size wheras down a group, number of shells increases and electron shielding prevents the outer electrons from being attracted by the nucleus and the resulting atomic size is very large
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