4. Which of the following substance is NOT a compound?
A. Carbon dioxide B. Hydrogen C. Salt D. Sugar
5. Which of the following describes an element?
A. The simplest substance.
B. It can be broken down into other types of substances.
C. It can be separated through a chemical process.
D. It is composed of two or more types of atoms.
6. Which of the following statements correctly describes a compound?
I. It can be broken down into a simpler type of matter by chemical
means.
II. It has unique properties that are different from the properties of its
individual elements.
III. It is composed of atoms of two or more elements that bond together.
IV. It is composed of atoms of the same kind.
A. I, II, III, IV C. I, II, IV only
B. I, II, III only D. II, III, IV only
7. Which of the following will be the result of compound if Hydrogen gas and
oxygen gas combine?
A. Hydrogen Peroxide B. Salt C. Sugar D. Water
8. What elements made up the compound Carbon Dioxide?
A. Carbon and Carbon C. Carbon and Oxygen
B. Carbon and Oxide 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 C. I, II, IV only
B. I, II, III only D. I and II only
10. Sodium is a silvery solid that reacts violently with water and chlorine. When they
combine to form the compound sodium chloride 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 have 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 elements, it maintains its properties even after it combines
with other elements.
D. True to all elements, they have the properties after they are combined.
11. Which of the following is substance compound?
A. Alloy B. Gold C. Iron D. Silver
12. Which of the following is an element?
A. Oxygen B. Gun powder C. Salt D. Water
For items 13—15, tell whether it is an example of an element or a compound. Write the
word ELEMENT if the sample shows characteristics of an element and COMPOUND if it shows characteristics of compound.
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Answer:
4.B.
5.A.
6.B.
7.D.
8.C.
9.C.
10.B
11. A.
12.A.
Explanation:
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