Electron diffraction - Study guides, Revision notes & Summaries

Instrumental Analysis ACS Final Prep Exam Questions With Correct Answers what are the difference between calibration sensitivity and analytical sensitivity - answercalibration sensitivity is the slope of a calibration curve at the concentration of interest while analytical sensitivity is a response to the noise ratio how to calculate calibration sensitivity - answery=mx+b (m is the calibration sensitivity) graph concentration vs mean analytical signal how to find the analytical sensitivit...

What is meant by work function (2) - ANSWER Minimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - ANSWER Minimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWER Energy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below th...

MMSC490 Practice Exam 1 with 100% correct Answers Cytoplasmic organelles are - Answer️️ -absent in prokaryotic cells and present in eukaryotic cells. E. coli is a useful model system for molecular biology studies because - Answer️️ -All of the above Arabidopsis thaliana is a model organism for studying the molecular biology of - Answer️️ - Plants The diffraction limited resolving power of a standard light microscope is approximately - Answer️️ -0.2 micrometers A common ...

How many lone pairs of electrons are on the central element in CCI4? correct answer: 0 Use the VSEPR theory to predict the molecular geometry of nitrogen tribromide, NBr3 correct answer: Trigonal Pyramidal ________hybrid orbitals are used for bonding by Xe in the XeF4 molecule. correct answer: sp^3d^2 Which set of ions are isoelectronic in their ground state electron configuration? correct answer: N^3-, o^2-, Mg^2+, Al^3+ The familiar phenomenon of a rainbow results from the diff...

What is meant by work function (2) - ANSWER Minimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - ANSWER Minimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWER Energy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below ...

BIO 235 Microbiology Exam TEST 1() units of measurement - CORRECT ANSWER1 µm = 10-6 m = 10-3 mm 1 nm = 10-9 m = 10-6 mm 1000 nm = 1 µm 0.001 µm = 1 nm total magnification (compound microscopes) - CORRECT ANSWER-the image from the objective lens is magnified again by the ocular lens -total magnification = objective lens x ocular lens resolution - CORRECT ANSWER-the ability of the lenses to distinguish two points. -shorter wavelengths of light provide greater resolution objective l...

What is meant by work function (2) - ANSWERMinimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - ANSWERMinimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - ANSWEREnergy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below the s...

Nucleoside vs. tide correct answers nucleoside: no phosphate group tide: A vs. B form of helix correct answers (both right handed) B: -predominant form in aq. -B can accommodate a spine of water molecules lying in the minor groove (not A): H bonding between h2o and DNA contributes to stability of B form -slightly tilted A: -RNA = always A b/c of steric hindrance in B w/ extra hydroxyl group -grooves are nearly equal -Bases lie farther to the outside and are strongly tilted with r...

Quantum Physics Already Verified A+ Photon ️A discrete unit or package of light energy Photoelectric Effect ️The emission of electrons from a metal when electromagnetic radiation of high enough frequency falls on the surface Threshold Frequency (f₀) ️The minimum frequency of light needed to eject electrons from a metal surface Work Function (Φ) ️The minimum energy needed to eject electrons from the surface of a metal Millikan's Stopping Potential Experiment ️An exp...

Instrumental Analysis ACS Final Prep Exam Questions With Correct Answers what are the difference between calibration sensitivity and analytical sensitivity - answercalibration sensitivity is the slope of a calibration curve at the concentration of interest while analytical sensitivity is a response to the noise ratio how to calculate calibration sensitivity - answery=mx+b (m is the calibration sensitivity) graph concentration vs mean analytical signal how to find the analytical sensitivit...