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Introduction to p Block Elements

28. which of ...

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28. which of the following have an (18 + 2) electron configuration ? A.Pb^{2+} B.Cd^{2+} C.Bi^{+3} D.SO_42-

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Q. Which of the following have an (18+2) electron configuration?

Write electronic configuration for the following elements.

$_{8}^{16} O$ , $_{14}^{28} S i$ , $_{17}^{35.5} C l$ , $_{18}^{40} A r$

Q. Which of the following element have the same chemical properties as an element having electronic configuration 2, 8, 5?

Q. Which one of the following ions has an electronic configuration of

[A r] 3 d^{6}

(A t o m i c N u m b e r : M n = 25, F e = 26, C o = 27, N i = 28)

Q. Which of the following electronic configuration corresponds to an element having the lowest

1 s t

ionization energy?

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