8. What elements made up the compound Carbon Dioxide
A. Carbon and Carbon
B. Carbon and Osside
C. Carbon and Oxygen
D. Carbon and Hydrogen
9. Which of the following is correctly matched?
I. Nitrogen: Element: Nitrous Oxide: Compound
II. Iron: Element: Rust: Compound
III. Mercury: Element: Copper: Compound
IV. Oxygen: Element: Water: Compound
A. I, II, III, IV
B. I, II, II only
C. I, II, IV only
D. I and I only
10. Sodium is a silvery solid that reacts violently wit a water and chlorine, When they
combine to form the compound sodium chloide known as salt, there is a
fundamental change in the properties. Salt is often added to our food when
cooking and it is safe to eat. Which of the following statements supports the idea
presented?
A. True to all compounds, they no longer are the properties of the elements
that makes them up.
B. True to some compounds, it maintains the properties of the elements that
makes them up.
C. True in all e lernents, it maintains its properties even after it combines
with other elenients.
D. True to all eleraents, they have the properties after they are combined
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Verified answer
Answer:
8.D.. not sure
9.C
10D
Explanation:
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