e2_f05_131 - CHE 131 Midterm Exam 2, Fall 2005 Multiple...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHE 131 Midterm Exam 2, Fall 2005 Multiple Choice - 4 points each Identify the letter of the choice that best completes the statement or answers the question. 1. The electron configuration for the element with atomic number 81 is: A. [Xe] 6s 2 5d 10 6p 1 B. [Xe] 6s 2 4f 14 6d 10 6p 1 C. [Xe] 6s 2 6f 14 6d 10 6p 1 D. [Xe] 6s 2 4f 14 5d 10 6p 1 E. none of the above 2. The number of orbitals having a given value of l is equal to A. 2 n + 2 B. l + m l C. 3 l D. 2 l + 1 E. the number of lobes in each orbital 3. Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na + < Mg 2+ < Al 3+ < Si 4+ Which of these give(s) a correct trend in size? A. III B. II C. IV D. II, IV E. I 4. How many of the following electron configurations for the species in their ground state are correct? Ca: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mg: 1s 2 2s 2 2p 6 3s 1 V: [Ar] 3s 2 3d 3 As: [Ar] 4s 2 3d 10 4p 3 P: 1s 2 2s 2 2p 6 3p 5 A. 3 B. 4 C. 2 D. 5 E. 1 5. Which of the following statements concerning bond energies is false? A. A carbon-carbon double bond is exactly twice as strong as a carbon- carbon single bond. B. Calculations of energy changes for reactions require no knowledge of the bond polarity but they do require a knowledge of the bond multiplicity and the average bond energy. C. A saturated alkane has carbon-carbon bonds with very similar bond energies. D. The formation of a carbon-oxygen double bond releases more energy than the formation of a carbon-oxygen single bond. E. The formation of a bond releases energy. 6. Which of the following is not determined by the principal quantum number, n , of the electron in a hydrogen atom? A. the size of the corresponding atomic orbital(s)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/11/2008 for the course CHE 131 taught by Professor Kerber during the Fall '08 term at SUNY Stony Brook.

Page1 / 8

e2_f05_131 - CHE 131 Midterm Exam 2, Fall 2005 Multiple...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online