Chemistry 0620 · IGCSE · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

The percentage composition of the gases in Neptune’s atmosphere is shown. Which statement about the atmospheres of Neptune and Earth is correct?

  • AThere is more helium on Neptune than oxygen on the Earth.
  • BThere is less methane on Neptune than carbon dioxide on the Earth.
  • CThere is less hydrogen on the Earth than on Neptune.
  • DThere is more helium on the Earth than on Neptune.

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