Diamagnetism Study guides, Class notes & Summaries

CHM 115 Exam 2 Purdue Latest Update Graded A+ Degeneracy Orbitals with a given n having identical energy Metals Lose electrons from valence shall form cations internal energy Potential and kinetic energy of all particles that make up the system nonmetals Add electrons to valence shells, form negative ions (anions) Work Energy transferred when an object moves by a force enthalpy total heat content of a system First law of thermodynamics ΔEsys = q + w What happens to enthalpy under constan...

paramagnetism presence of unpaired electrons Examples P, Ti, NO Diamagnetism paired electrons Examples N2 and O2 Why does O2 stick between magnetic poles? paramagnetic; has unpaired electrons that align with the magnetic field Molecular Orbital Theory a theory that accounts for the allowed states for electrons in molecules Amplitude of wave functions added Bonding

MRI PRACTICE QUESTIONS and answers 2023What are two categories that diagnostic imaging contrast depends on? - correct answer Intrinsic and Extrinsic parameters Intrinsic parameters - correct answer -T1 recovery -T2 decay -PD -Flow These cannot be manipulated Extrinsic parameters - correct answer -TR -TE -FA -TI -b-value -echo train These can be manipulated by the MRT Factors that determine T1 and T2 relaxation times of tissue? - correct answer -the inherent energy of the tissu...

1. Slew rate: Speed at which gradient coil turns on and off 2. Time-varying Gradient: Induced current in a patient 3. Magnetic Flux Lines: Travel from North to South pole 4. permanent magnet: Can not be turned off Very inexpensive; extremely heavy Approximately 0.4T Vertical vector 5. Resistive magnet: Can be turned on and off Costly due to cooling Approximately 0.6T Vertical or horizontal vector 6. Superconductive magnet: Approximately 10T Low electricity; reasonable cost 7. Active sh...

Zero Boil-Off - Answer System that reduces/eliminates the need to recharge Helium in a magnet. Quench - Answer Quickly eliminating the magnetic field. Not immediate, takes 3 to 5 minutes to completely eliminate magnetic field. Loud Noise as Helium rushes out of Quench Vent. Can cause crack in the wire (very costly to repair/replace). Ohm's Law - Answer Resistance that is equal to Voltage divided by the amperage in a wire. V=IR Use of Cryogen reduces/eliminates heating with ...

Slew rate - Speed at which gradient coil turns on and off Time-varying Gradient - Induced current in a patient Magnetic Flux Lines - Travel from North to South pole permanent magnet - Can not be turned off Very inexpensive; extremely heavy Approximately 0.4T Vertical vector Resistive magnet - Can be turned on and off Costly due to cooling Approximately 0.6T Vertical or horizontal vector Superconductive magnet - Approximately 10T Low electricity; reasonable...

ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers The physical material of the universe. It is anything that has mass and occupies space. - CORRECT ANSWER Matter is made up of relatively few elements. - CORRECT ANSWER Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - CORRECT ANSWER Atom Each _______ is made of the same kind of atom - CORRECT ANSWER Element Combination of atoms held together i...

MRI System Component Questions and Answers 100% correct MRI machines vary in both size and shape The older designs had a more compact and small space and were very closed The scanner hardware required consists of: 1. A magnet 2. A radio frequency source 3.A magnetic field gradient system 4.A computer system 5.An image processor in the scanner hardware the magnet is for __________________ nuclear alignment in the scanner hardware the radio frequency source for RF is ...

magnetism - correct answer -property of matter that results from orbiting electrons in atoms - magnetic moments with angular momentum -field strengths measured in units of Gauss(G) and Tesla (T) - 1T= 10,000G - earth 0.5 G ferromagnetism - correct answer -contain iron, nickel or cobalt -large positive magnetic susceptibility -remain magnetized even when external magnetic field is removed -cause artifacts such as loss of signal and spatial distortion paramagnetism - correct answer - ...

Chapter 3 Quantum Theory and the Electronic Structure of Atoms 1. What is the capacity to do work and transfer heat? A. electricity B. power C. energy D. temperature E. work Accessibility: Keyboard Navigation Bloom's Level: 2. Understand Chapter: 03 Quantum Theory and the Electronic Structure of Atoms Difficulty: Easy Subtopic: System/Surroundings and Heat/Work Topic: Thermochemistry 2. What kind of energy results from the interaction of charged particles? A. thermal energy B. kineti...