the answer is A please explain how
Answers
Explanation:
In column (I), the first element if you observe has a completely filled p-orbital, hence it is very likely an inert gas as it has completed octet, hence it has a positive electron gain enthalpy, hence (i) matches to D
In the second element in column (I), the final electron enters into s-orbital, hence it is an s-block element, and s-block elements possess very low negative electron gain enthalpies as they tend to donate electrons rather receive, hence (ii) matches to A
The third element in column (I) has a 2p-orbital with just one vacant space, or in other words we can say it has a valency 1 and will show great tendency to acquire an electron and complete octet. Hence it must have the highest negative electron gain enthalpy among the given options
Hence (iii) matches to B
The fourth element in column (I) has a 2p-orbital which is having 2 vacant spaces. It will also tend to acquire two more electrons to fill octet, but this tendency to acquire the electrons will be less than the element (iii), since both these elements occur on the same period of the periodic table and generally the negative electron gain enthalpy increases from left to right across a period. This is due to higher energy requirements.
Hence (iv) matches to C
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Answer:
Explanation:
In column (I), the first element if you observe has a completely filled p-orbital, hence it is very likely an inert gas as it has completed octet, hence it has a positive electron gain enthalpy, hence (i) matches to D
In the second element in column (I), the final electron enters into s-orbital, hence it is an s-block element, and s-block elements possess very low negative electron gain enthalpies as they tend to donate electrons rather receive, hence (ii) matches to A
The third element in column (I) has a 2p-orbital with just one vacant space, or in other words we can say it has a valency 1 and will show great tendency to acquire an electron and complete octet. Hence it must have the highest negative electron gain enthalpy among the given options
Hence (iii) matches to B
The fourth element in column (I) has a 2p-orbital which is having 2 vacant spaces. It will also tend to acquire two more electrons to fill octet, but this tendency to acquire the electrons will be less than the element (iii), since both these elements occur on the same period of the periodic table and generally the negative electron gain enthalpy increases from left to right across a period. This is due to higher energy requirements.
Hence (iv) matches to C
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