HW04_1 - Chemistry 111 Homework#4 Due(Wednesday 1 What is...

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Chemistry 111 Homework #4 Due: September 28, 2005 (Wednesday) 1. What is the radius of the Be 3+ ion in its n=6 level in the Bohr model? (a) 4.76 Å (b) 4.76 nm (c) 0.794 Å (d) 5.88 pm (e) 5.88 Å (f) not in the list Questions 2 – 4 are true or false, and relate to problem 1 above. 2. If the Be 3+ ion above absorbs a photon, its radius will decrease. 3. The radius of the Li 2+ ion in its n=6 level is 1.333 times larger than the radius of the Be 3+ ion above. 4. The radius of the Be 3+ ion above is equal to the radius of the C 5+ ion in its n=9 state. 5. What is the energy of the Be 3+ ion in its n=6 state? (a) -1.92 x 10 -17 J (b) 9.69 x 10 -19 J (c) -2.18 x 10 -18 J (d) -9.69 x 10 -19 J (e) -4.91 x 10 -18 J (f) not in the list 6. The Be 3+ ion above drops down to the n=2 level. How many of the following statements are TRUE ? The transition is in the Be 3+ equivalent of the Balmer series of the hydrogen spectrum. A photon of 25.6 nm is emitted. A photon of 25.6 nm is absorbed. The radius of this ion decreases. The photon emitted or absorbed has a longer wavelength than the photon emitted or absorbed when C 5+ undergoes the same n=6 Æ n=2 transition. 8. How many subshells are there in the fourth shell? Write the numerical answer in blackboard.
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Chemistry 111 2 Homework #4 / Fall 2005 9. How many orbitals in a given atom can have the designation 6d? Write the numerical answer in blackboard. 10. How many of the following are possible p orbital in the fifth shell? Type your numerical answer in Blackboard. (5, 1, -2) (5, 2, -1) (5, 2, -2) (5, 1, -1) (5, 1, +1) (5, 0, 0) 11. What is the maximum theoretical number of electrons that can be placed in the sixth shell? Write the numerical answer in blackboard. 12. How about in the 6f subshell? Once more, write the numerical answer in blackboard. 13. How many electrons can possibly have the quantum numbers (4, 2, -1)? 14. The following set of 3 quantum numbers represents an orbital in an atom. True or false? (4, 2, -2). 15. How many electrons can have the set of quantum numbers (5, 3, 1, +1/2)? Type your numerical answer in Blackboard. 16. How many electrons in the third (3rd) shell may have m l = 3 (the third quantum number)? Again, write the number in blackboard. 17. What is the maximum number of electrons in the fourth (4 th ) shell that may have m l = 2 (the third quantum number)? Again, write the number in blackboard. 18. What is the maximum number of electrons in the fifth (5th) shell that may have l = 3 ? Write the number in blackboard. 19. How many electrons in the 7g subshell may have a spin quantum number m s of -1/2? Write the number in blackboard. Questions 20 – 31 are true or false … 20. Only two electrons may have the following values for the first three quantum numbers in an atom: (4, 1, -2).
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Chemistry 111 3 Homework #4 / Fall 2005 21. Consider the following set of four quantum numbers: (3, x , 1, -1/2). There are only three possible values for x that may be substituted in order to make an acceptable set for a given electron in an atom.
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HW04_1 - Chemistry 111 Homework#4 Due(Wednesday 1 What is...

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