The correct answer is option A- Al has the largest atomic radius.
We are aware that when atomic number increases, the number of shells also rises and, consequently, does atomic radius down a group in the periodic table. Along a period, as the atomic number rises, the nuclear charge rises as well, leading to an increase in the nuclear force of attraction. As a result, atomic radius shrinks over time.
Since the third period is below the second period, it will have a bigger atomic radius than the second period.
In the periodic table, aluminum and boron both belong to the same group. Atomic radius tends to rise from top to bottom within a group, according to this trend. The fact that aluminum is included in the periodic table below boron indicates that it has a bigger atomic radius than boron.
Hence, Aluminium has the largest atomic radius among the given options.
To learn more about atomic radius refer- https://brainly.com/question/12131433
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