Cem 141 msu exam - Study guides, Class notes & Summaries

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when the numb...

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - Answer-D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when t...

CEM 141 MSU EXAM 2 QUESTIONS AND ANSWERS WITH SOLUTIONS 2024

The statement "If I add cold milk to hot coffee the temperature will decrease," is a? - Answer-Claim, always include an explanation and reasoning to the claim. Scientific Model - Answer-Models are used to make testable predictions How much is a picometer? - Answer-0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy - Answer-Microscopes that now allows us to view atoms. Leaves are green in the summer because? - Answer-A plant's leaves are green in the summer becaus...

Ionization Energy - energy required to remove an electron from an atom in the gas phase Left Side Electrons - have weaker attractions to remove electrons *easier to remove electrons from the left side of the table than the right side* Does it take MORE or LESS energy to remove an electron from Li than from Na? - MORE Why? Because as we move down a group, the orbitals become larger and weaker. While going across the effective nuclear charge increases. (holds onto the electrons tighter) Big ...

The statement "If I add cold milk to hot coffee the temperature will decrease," is a? - Claim, always include an explanation and reasoning to the claim. Scientific Model - Models are used to make testable predictions How much is a picometer? - 0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy - Microscopes that now allows us to view atoms. Leaves are green in the summer because? - A plant's leaves are green in the summer because they contain chlorophyll. Chloro...

CEM 141 MSU Exam Questions And Answers

Ionization Energy Ans: energy required to remove an electron from an atom in the gas phase Left Side Electrons Ans: have weaker attractions to remove electrons *easier to remove electrons from the left side of the table than the right side* Does it take MORE or LESS energy to remove an electron from Li than from Na? Ans: MORE Why? Because as we move down a group, the orbitals become larger and weaker. While going across the effective nuclear charge increases. (holds onto the electrons ...

MSU CEM 141 FINAL EXAM WITH COMPLETE SOLUTIONS scientific question can be answered by doing experiments, making observation, taking measurements, etc. in a replicable way Lights acts as what? Particle and wave. scientific model drawing, graph, diagram, equation. represent many chemical entities. Wavelength The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared (blue) Short - higher energy Long - lower energy scientific theory A well tested concept t...

CEM 141 MSU EXAM 1 QUESTIONS AND ANSWERS WITH SOLUTIONS 2024