For the element Selenium (Se), state: How many principal energy levels (PEL's) it has? How many (PEL's) and which ones are occupied? How many (PEL's) and which ones are full?
How many Sub-Levels it has? How many (sub levels) and which ones are occupied? How many (sub levels) and which ones are full?
How many Orbitals it has? How many (orbitals) and which ones are occupied? How many (orbitals) and which ones are full?

Theoretically, which metal should be the most reactive? hydrogen lithium francium fluorine

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.