Question

Which of these is true about pure substances?

A) They can only contain one type of atom
B) They may contain one type of atom or one type of molecule
C) They can contain different types of atoms and molecules
D) They can contain only one type of molecule

Answer 1

The answer to your question is B) They may contain one type of atom or one type of molecule.

Answer 2

after doing research and taking the test the correct answer is they may contain one type of atom or one type of molecule so your answer would be B