Give the symbol of the element that has the largest atomic size in group 3a (13).

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Skylar Russo

Chemistry

16 May, 19:42

Give the symbol of the element that has the largest atomic size in group 3a (13).

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Enrique Horton · Answer 1

This family of elements is headed by boron. In this case, atomic size increases as one goes down the periodic table, as there are more electrons in each successive element needed to fill the outer shells. As such, thallium, at the lowest level of the group 3a column, will have the largest atomic size.