1) Which group in the periodic table will have the most negative electron affini

Question

1) Which group in the periodic table will have the most negative electron affinity in each row? why?

2) write a chemical equation to represent the following processes (include state symbols) For example, the process associated with the second ionization energy of magnesium would be Mg+ (g) --> Mg 2+ (g) + e-

     (a) the third ionization energy of Al

      (b) The electron affinity of Br

3) the following ions represent an isoelectronic series: Ca2+, Cl-, S2-, K+

    (a) How many electrons do these species have?

    (b) arrange this series into increasing ionic radius (smallest to largest)

4) The first 6 ionization energies (i1-i6) for a mystery atom are: i1= 1009 kj/mol, i2= 1852 kj/mol, i3= 2817 kj/mol , i4= 12862 kj/mol, i5= 18210 kj/mol, i6= 24918 kj/mol. which group of the periodic table is this element likely a member of? explain.

5) write Mn2+ ion in noble gas notation

6) Determain whether each of the following sets of quantum numbers is allowed or is not allowed. in the case where your answer is not allowed explain why that combo is not possible.

   (a) n=4 ; l=2; ml= -1; ms= 1/2

    (b) n=4; l=2 ; ml= -2 ; ms= -1/2

    (c) n=2 ; l=0 ; ml= -1 ; ms= -1/2

Explanation / Answer

1) 7 th gp because 1 electron less than to octet electronic configuration so these accepts 1 electron and can have -ve elctro affinity values

2) Al ^+2 ..........> Al^+3 + 1e-

3) - 324KJ/mol

4) 3rd gp

5)[Ar]3d3 4s0

6) a is allowed

    b is is allowed

   c is not allowed because ml value is more than l value whch is not possible

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