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Question

How do the atomic radii of elements change as we go from left to right in a period of the periodic table?


Solution

As we go from left to right in a period of the periodic table, the atomic radii decrease.

As we move from left to right in a period, the no of electrons in the outer shell of the atom increase, which results in an increase in nuclear charge of the nucleus, as the same no of protons are added to the nucleus. This increases the force of attraction between the nucleus and electrons in the outer shell.

Due to this increased force, the size of the atom shrinks towards the nucleus, and hence the size decreases


Chemistry
Science for Tenth Class - Part II - Chemistry
Standard X

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