Question

Rank the following ions in order of decreasing ionic radius: S2-, O2-, F-, Na+, Mg2+

Rank the following ions in order of increasing first ionization energy: O2-, Mg2+, F-, Na+

Rank the following ions in order of decreasing ionic radius: S2-,02-, F-, Na Mg 2+. A. 52-02-, F. Nat. Mg2+ B. 02-, F, Na+, Mg2+, 52- C. Mg2+, 52-, Na+, F, 02- D.02-,52-,F, Na+, Mg2+ E. Mg2+, Na+, F, 02-, 52- QUESTION 25 Rank the following ions in order of increasing first ionization energy: 02-, Mg2+, F., Na + A. 02-<F<Mg2+ < Na+ B. Mg2+ < Na* <F-<02- C. Mg2+ < 02- <Na* <F- D. 02- < Mg2+ <F<Na+ E. 02- <F-«Na+ < Mg2+

Answer 1

24)

Atomic size increases from top to bottom in groups and deceesde from left to right in periods.

The ions which are having same number of electrons are called as isoelectronic species. The isoelectronic ion size increases with increasing negative charge and decreses with increasing positive charge.

Hence the order of decreasing ionic radius is

A) S^2- , O^2-, F^-, Na^+ , Mg^2+

25)

Ionization energy: The minimum amount of energy required to remove an electron from the outermost shell of gaseous nuetral atom.

Ionization energy decreases from top to bottom in groups and increases from left right in periods.

Ionization energy is inversely proportional to atomic radius

Hence the order of increasing ionization energy is

E) O^2- < F^- < Na^+ < Mg^2+