for an 19. Which of the following electron configurations represents the ground

Question

for an 19. Which of the following electron configurations represents the ground state element? A. [Ne]3s 3p B. [He]2s 2p C. [Nej3s 3p3d D. [Ne]3s 3p 3d E. [Ne]3s 3p 21. Which of the following elements has the largest atomic size? A. S B. Ca C. Ba D. Po E. Rn 20. Which of the following elements has the smallest atomic size? A. Na B. Ar C. K D. Ca E. Kr 22. Which of the following elements has the largest first ionization energy? A. Na B. CI C. Ca D. Te E. Br 23. Elements with first ionization energies and electron affinities generally form anions. A. low, very negative B. high, positive or slightly negative C. low, positive or slightly negative D. high, very negative E. None of these is generally correct

Explanation / Answer

19)

A) without completely filling s orbital, electrons can’t occupy p orbital

So, this is excited state

B) without completely filling s orbital, electrons can’t occupy p orbital

So, this is excited state

C) without completely filling p orbital, electrons can’t occupy d orbital

So, this is excited state

D) without completely filling p orbital, electrons can’t occupy d orbital

So, this is excited state

E) This is correct

Answer: E

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