Which statement about Niels Bohr's atomic model is true? Higher orbits have lower energies.
&
Each orbit has a specific energy level.
Electrons can exist in any energy level.
Orbits close to the nucleus have no energy.

Classify each statement about effective nuclear charge, zeff, as true or false.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

What are the similarities of physical and chemical change ?