What are the two basic ways in which ions form from atoms?

contrasts sodium and chloride ions including how they form. Write the symbol for each ion.

An ion is an atom or group of atoms that has an electric charge. When an atom loses an electron, it loses a negative charge and becomes a positive ion. When an atom gains an electron, it gains a negative charge and becomes a negative ion. a sodium ion forms when a sodium atom loses one electron and becomes positively charged. a chloride ion forms when a chlorine atom gains one electron and becomes negatively charged.

Hope this helps,

      Arabella

c is the answer because when something is left after something evaporates that shows the chemical change.