Another way to represent a substance is with its name. in this case, the substance’s name is carbon dioxide. the prefix di means two. the word oxide refers to oxygen. what information does the word dioxide provide?

He is right:  
Dioxide-
 the substance contains two atoms of oxygen

Answer trigonal pyramidal;

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.