PreparED Study Materials
CHEM 101: General Chemistry
School: Northwestern University
Number of Notes and Study Guides Available: 1
Notes
Videos
Identifying Incorrect Ground-State Electron Configurations and Providi
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
This video delves into the significance of electron configurations in understanding an atom's chemical behavior. It examines and corrects inaccuracies in the electron configurations of Aluminium (Al), Boron (B), and Fluorine (F). For instance, the electron configuration for Aluminium is initially presented with an incorrect number of electrons in the 2p subshell, stressing the importance of adhering to the rules of electron configuration for precise atomic representation.
Pure Substances vs. Mixtures: Classifying Based on Composition & Distr
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Understand the fundamental distinctions between pure substances and mixtures. Unpack the definitions and real-world examples of elements, compounds, homogeneous, and heterogeneous mixtures.
What is a propeller twist?
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Unravel the concept of propeller twist and its role in aviation and marine propulsion. We'll delve into the science and engineering behind this intriguing phenomenon, shedding light on its applications and significance.
Does Cesium Bromide & Hydrogen Iodide in Water Conduct Electricity?
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the conductivity of aqueous solutions: Cesium bromide and hydrogen iodide. Understand their ionic nature and how it leads to the presence of charged ions enabling electricity conduction
Mass of Solutions: 12g Sucrose in 4.1%, 3.2%, & 12.5% Cases
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Determining the total mass of sucrose solutions at varying concentrations: 4.1% 3.2% and 12.5%. Learn step-by-step calculations to find solution masses containing 12 grams of sucrose. Results: ~292.68g ~375g and 96g for each concentration respectively.
Electron Configurations: Zn Cu Zr & Fe Transition Metals Explained!
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Unravel electron configurations for transition metals including zinc copper zirconium and iron. Understand how atomic number influences electron arrangement based on the Pauli exclusion principle Hund's rule and the Aufbau principle. Decode the configurations of each metal with clarity.















