We are asked to arrange the following in increasing EI1 or the first ionization energy.
Ionization energy (I. E.) is the energy required to remove an electron from a gaseous atom or ion.
•First I.E. corresponds to removing the first valence electron from a neutral atom
•Second I.E. refers to removing a second electron
•Third I.E. refers to removing the third electron
The trend of the ionization energies of the elements can be observed in the periodic table:
• increases going from left to right of a period
Place the following in order of increasing IEI.
N F As
a. As < F < N
b. F < As < N
c. As < N < F
d. F < N < As
e. N < As < F
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