Question

18 of 30 | Short Answer
The first electron enthalpy is negative while second, third and so on are.

Answer 1

Answer:

On the basis of the nature of the element, the process of accepting electron in an atom can either be exothermic or endothermic. In general, energy is released when an electron is added to an atom and the electron gain enthalpy for such elements is negative. The electron gain enthalpy of halogens is highly negative because it needs only one electron to achieve the nearest noble gas configuration. And for noble gases, it is highly positive because the extra electron has to be placed in the next higher principal quantum level which requires lots of energy.

Explanation:

Answer 2

Answer:

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Explanation:

The first electron gain enthalpy is negative because energy is released while accepting an electron.

But as soon as the atom attains a stable state configuration then it loses its affinity toward any other electron. Thus when we force any other electron into the same atom for our reaction purposes then the atom will lose energy to stay in the stable form.

So the consecutive enthalpies will be postitve since we are supplying energy from outside to make the electron enter into the atom.