Question

_7. Which of the following is an example of an element?
A. Iron B: Hydrogen peroxide C. Salt D. Water
8. What elements made up the compound Potassium nitrate?
A. Potassium and Oxide C. Potassium and Hydrogen
B. Potassium and Nitrogen D. Potassium and Potassium
9. All of the following are correctly matched compound, EXCEPT:
A. Carbon and Oxygen (Carbon dioxide)
B. Sodium and Chlorine (Sodium chloride)
C. Hydrogen and Water (Hydrogen dioxide)
D. Potassium and Nitrogen (Potassium Nitrite)​

Answer 1

Resposta:

7) A ) Iron

8) B) Potassium and Nitrogen

9) Sodium and Chlorine

Explicação: