PE2 Solutions - Livasy, David Exam 1 Due: Sep 15 2006, 5:00...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Livasy, David Exam 1 Due: Sep 15 2006, 5:00 pm Inst: Donna C Lyon 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. This HW assignment is due Thursday, September 14, by 4:00 PM. 001 (part 1 of 1) 10 points List in order of increasing atomic size (small- est to largest) the atoms whose atomic num- bers are 6, 32, 7. 1. 6, 7, 32 2. 32, 6, 7 3. 32, 7, 6 4. 7, 6, 32 correct Explanation: Element Electronic configuration 6 2 4 [He] 2 s 2 p Group 4, Period 2 Valence electrons in period 2 7 2 5 [He] 2 s 2 p Group 5, Period 2 Valence electrons in period 2 32 2 8 18 4 [Ar] 4 s 3 d 4 p Group 4, Period 4 Valence electrons in period 4 Period 4 is farther from the nucleus than period 2. The half-filled 2 p orbital of ele- ment #7 is energetically more stable and has greater effective nuclear charge than that of element #6. 002 (part 1 of 1) 10 points Arrange the following types of photons of elec- tromagnetic radiation in order of decreasing energy: red light, radio, x-rays, -rays, in- frared. 1. -rays > x-rays > radio > infrared > red light 2. x-rays > red light > infrared > -rays > radio 3. radio > red light > infrared > x-rays > -rays 4. x-rays > -rays > red light > infrared > radio 5. -rays > x-rays > red light > infrared > radio correct Explanation: 003 (part 1 of 1) 10 points What is the subshell notation and the number of orbitals having the quantum numbers n = 4, = 2? 1. 4 p and 3 2. 4 f and 14 3. 4 d and 5 correct 4. 4 f and 7 5. 4 d and 10 Explanation: 004 (part 1 of 1) 10 points The first ionization potential of the elements B, C, and N (atomic numbers 5, 6, and 7) steadily increases, but that of O is less than that of N. The best interpretation of the lower value for O is that 1. the electron removed from O is farther from the nucleus and therefore less tightly bound than that in N. 2. the ionization potential of N is a maxi- mum and the values decrease steadily for the elements O, F, and Ne. Livasy, David Exam 1 Due: Sep 15 2006, 5:00 pm Inst: Donna C Lyon 2 3. the half-filled set of p orbitals in N makes it more difficult to remove an electron from N than from O. correct 4. there is more shielding of the nuclear charge in O than in B, C, or N.charge in O than in B, C, or N....
View Full Document

This note was uploaded on 04/19/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.

Page1 / 5

PE2 Solutions - Livasy, David Exam 1 Due: Sep 15 2006, 5:00...

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