## Answers

According to the given pattern of ionization energies , first 6 electrons are removed easily with less ionization energies. Ionization energy increases drastically for 7th electron i.e. 7th electron must have been removed from a highly stable Noble gas configuration.

This element has 6 electrons in valence shell.

Only oxygen atom in period 2 has 6 electrons in valence shell.

Hence this element is Oxygen.

Answer -- oxygen

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