An ice cube and a scoop of table salt are left outside on a warm, sunny day. explain why the ice cube melts and the salt does not

the reason why is that salt is a solid while ice is a liquid solid

or something like that but don't forget to put that it is  a solid

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.