Which of the following states that no more than two electrons can occupy an atomic orbital and that two electrons in the same orbital must have opposite spins?
a. hund's rule
b. dalton's theory
c. the aufbau principle
d. the pauli exclusion principle

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).