Engineering Board Exam Reviewer · Chemistry · easy
The rule stating that electrons fill degenerate orbitals singly before pairing up is:
- Pauli exclusion principle
- Aufbau principle
- Hund's rule
- Octet rule
Answer
C. Hund's rule
Solution
This maximizes total spin.
More Chemistry questions
- The charge of the electron was first measured accurately in the oil drop experiment by:
- The neutron was discovered by:
- The scientist who discovered the electron through cathode-ray experiments was:
- Atoms of different elements that have the same mass number are called:
- The mass number of an atom is the total number of:
- The atomic number of an element is equal to the number of:
- Dissolving 2 g of a nonelectrolyte in 100 g of water lowers the freezing point by 0.372 °C. What is the molar mass of the solute? (Kf =…
- The activity of a radioactive sample drops from 800 counts/min to 100 counts/min in 30 minutes. What is its half-life?
- 50 mL of 1.0 M HCl is mixed with 50 mL of 1.0 M NaOH in a calorimeter, and the temperature rises by 6.8 °C. Assuming the solution has a…
- How much heat is released by burning 23 g of ethanol ( C2H5OH)? ( Hc = -1367 kJ/mol) (Use H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32…