As I see this Compounds and Elements are very different things, both are pure substances, but as I see this as an easier way to differentiate these to things based on their chemical names like "H2O", since it has two different types of atoms, while "He" explains the derived from the Greek, 'helios' meaning sun for it was in the sun's aureole that helium was first detected.
Answers & Comments
Answer:
Heres the answers
Explanation:
1. Helium
2. Water
3. Helium
4. Water
5.
As I see this Compounds and Elements are very different things, both are pure substances, but as I see this as an easier way to differentiate these to things based on their chemical names like "H2O", since it has two different types of atoms, while "He" explains the derived from the Greek, 'helios' meaning sun for it was in the sun's aureole that helium was first detected.