30 points for who ever ! write a paragraph on ions. include the following underlined terms: precipitate, insoluble, anion, cation, polyatomic ion, and ionic bonding.

Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms, in the case of polyatomic ions) gains or loses electrons.

Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral.

Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion).  Covalent compounds are formed when two nonmetals react with each other.  Since hydrogen is a nonmetal, binary compounds containing hydrogen are also usually covalent compounds.

Main-Group Metals (Groups IA, IIA, and IIIA)

Group IA, IIA, and IIIA metals tend to form cations by losing all of their outermost (valence) electrons. The charge on the cation is the same as the group number. The cation is given the same name as the neutral metal atom.

Ions of Some Main-Group Metals (Groups IA - IIIA)

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

10 years is the answer