Which of the following has the largest second ionization energy? a) Na b)P c) Al

Question

Which of the following has the largest second ionization energy? a) Na b)P c) Al d) Mg The size of an element's atomic radius ______ from left to right across the periodic table. a) remains constant b) is randomly assigned c) increases d) decreases The electron configuration of a ground-state Cu atom is______. a) [Ar] 4s^1 4d^10 b) [Kr] 5s^1 4d^10 c) [Ar] 4s^2 4d^9 d) [Kr] 5s^2 4d^10 Alkali metals have the lowest first ionization energies of the groups listed below. (Transition elements, Halogens. Alkaline earth metals, Alkali metals) True False Sodium is much more suitable to exist as a caption than is chlorine. This is because chlorine is more metallic than sodium.

Explanation / Answer

1) sodium has highest second ionization potential as after removal of one electron it attains noble gas configuration

2) On moving from left to right the atomic number increases while the number of shells remain the same, so the size increases.

3) The ground state electronic configuration is [Ar] 3d10 4s1

4) True, as after losing one electron they attain noble gas configuration

5) False, sodium is more metallic and has tendancy to lose electron easily

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