Acrystallographer measures the horizontal spacing between molecules in a crystal. the spacing is
13.9
nm
. what is the total width of a crystal in millimeters
105
molecules across? write your answer as a decimal.

the correct answer is:

a. formation of precipitation

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.