Aknown compound contains two atoms of sulfur and two atoms of oxygen. write the name and formula of this compound.

The compound is S₂O₂ or disulfur dioxide.

S₂O₂ contains two atoms of sulfur and two atoms of oxygen.

It is also known as the dimer of  sulfur monoxide, SO.

Both sulfur and oxygen are nonmetals. So when naming nonmetals we put a prefix before them. 'di' means 2. Since there are two atoms of each element of  sulfur and oxygen, we name S₂O₂ as disulfur dioxide.

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.

po-215 i got it right on the quiz