According to hund's rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until a. there are two electrons in each orbital. b. electron velocities become constant. c. all the orbitals contain one electron, with opposite spins. d. all the orbitals contain one electron, with spins parallel.

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?