Which of the Following Statements Is False

Which of the following statements is false?

A) The first word in the name of a binary molecular compound is the name of the element appearing first in the chemical formula, including a prefix to indicate the number of atoms of that element in the molecule
B) The same two nonmetals often form more than one binary compound
C) If an element has no prefix in the name of a binary molecular compound, you may assume that there is only one atom of that element in the molecule
D) A compound whose formula ends in O₅ is a pentaoxide rather than a pentoxide
E) The numerical prefix used in chemical names for the number 2 is di-