1.

On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases.The first ionization potentials (in eV) of As and Se atoms, respectively, are:

Answer»

On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases.

The first ionization potentials (in eV) of As and Se atoms, respectively, are:


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