Which of the following is true about the modern model of the atom? a. Electrons orbit the nucleus in shells at fixed distances
b. Protons, neutrons , and electrons are located in the nucleus
c . Atoms are hard, indivisible spheres
d. A positive nucleus is surrounded by negative electrons

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?

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml