17. Which of the following is the electron configuration for the aluminum? AC A)

Question

17. Which of the following is the electron configuration for the aluminum? AC A) 1 C) 1 583 9L C. 224 g D. 27 2 91 E.7699 01 18. Which of these gases will have the greatest density at the same specified temperature and pressure? A) Ha B) CCIF C) Co. E) CF. 19. Which of the atoms listed below has the largest radius? A) CI B) I C) P D) Sb E) Se 20 Arrange the following ions in order of increasing ionic radius: K". P, s cr. 12 21. Which of the elements listed below has the highest first ionization energy? A) He B) Ne C) Ar D) Kr E) Xe 22. As, p, d and fsublevel can hold a maximum of (in order) A) B) C) 2, 6, 10, 14 electrons 2,5, 10, 12 electrons 2,6, 8, 10 electrons D) 2, 8, 18, 32 electrons E) 6, 8, 10, 32 electrons 23. Calculate the density of Bra(g) at 59.0C and 1.00 atm pressure. 2) A. 3.45 g/L

Explanation / Answer

17) Al = 13 = 1s2 2s2 2p6 3s2 3p1

18) from ideal gas equation,

    density(d) = PM/RT

M = molarmass of the gas

higher the molar mass,higher the density

answer: B molarmass of CClF3 = 104.46 g/mol

20) iso electronic species, size increases,by increasing -ve charge.

order: K+ < Cl- < s2- < P3-

answer: A

22) s = maximum 2 electrons

    P = maximum 6 electrons

    d = maximum 10 electrons

    f = maximum 14 eelctrons.

answer: C

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