The four substances below are either elements or compounds. Which are which?

Question

Quizplus · Accepted Answer

The two substances with multiple symbols (11ea82ef_477c_14e8_aa40_23c88b3b7c0f_TB6000_11 and 11ea82ef_477c_14e9_aa40_df52dec22b2a_TB6000_11) are elements, as they have unique chemical symbols. The substance with a single symbol (11ea82ef_477c_14ea_aa40_29eb74499682_TB6000_11) is a compound, as it is made up of multiple elements. The substance with three symbols (11ea82ef_477c_14eb_aa40_93d70a059e93_TB6000_11) is also a compound, as it is made up of multiple elements.

The Four Substances Below Are Either Elements or Compounds