Question

5. Explain the trend of the following in
group 13 elements :
A. atomic radii B. ionization enthalpy
C. electron affinity
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Answer 1

Explanation:

A general fact about the atomic radius of periodic table elements is that it decreases from the bottom-left to the top-right, hence for group 13 atomic radius increases from top to bottom ( i.e Tl has the largest)

Ionization enthalpy decreases down the group

Electron affinity becomes less negative down the group except first element boron, lower elements are less reactive, or more stable

Answer 2

Atomic radii:- atomic radii of group 13 elements increase from top to bottom in the group. This is due to increase in the number of energy shells in each succeeding element. However, the atomic radius of gallium (Ga) is less than that of aluminum (Al) .

ionization enthalpy:- properties and periodic trends. These elements found in group 13 of the p-block in the periodic table of the elements. Ionization enthalpy decrease going down the group, because the electrons are further from the core and therefore are easier to remove; Tl does not fit this trend.

Electron affinity:- electron affinity become less negative down the group except first element boron, lower element are less reactive, or more stable.

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