Question

define electron gain enthalpy how does it vary along the period
what would be the iupac name for the elements with atomic number 1o8

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Answer 1

Answer:

Electron Gain Enthalpy:  The energy used to add more electrons to an atom.

Along a period, atomic radius decreases due to increase in nuclear charge. It would be more easier to add  electrons to an atom small in size because the electrons would soon get influenced by nuclear charge. Thus, electron gain enthalpy decreases along a period.

unniloctium - iupac naming

Explanation:

108

1= un

0= nil

8= oct

+ ium