Hi, help with these two questions. 1. Write the isotope notation for an atom with 9 protons and an atomic mass of 20.

2. Write the isotope notation for an atom with 13 protons and 12 neutrons.

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?

In one or two grammatically correct sentences, write a definition for the term molecule geometry

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice