Question

8. What substance is composed of only one kind of atom?
A. Element
B. Compound
C. Pure substance
D. Mixture
9. When one or more substance is combined it is called
A. Element
B. Compound
C. Pure substance
D. Mixture
10. Which of the following set of properties talks about a compound?
I. Made up of one or more atoms
II. Joined through chemical process
III Composed of one or more substance
IV. Mixtures of one or more different
substances
A. I and II only
B. II and III only
C. III and IV only
D. I, II, III, IV
11. Which of the following set of properties talks about an element?
I. Made
up
of one or more atoms with same
properties
II. Cannot be separated through any process
III. Composed of one or more substance
IV. Mixtures of one or more elements
A. I and II only
B. II and III only
C. III and IV only
D. I, II, III, IV
For number 12-15. Which of the following does the illustration talks about? Copy the
illustrations below and write whether it describes an element or compound.
12.
13
14.
15.​

Answer 1

The questions can be answered as follows:

Explanation:

• 8. The correct option is A) Element. An element is composed of only one kind of atom,
• 9. The correct option is D) Mixture. When one or more substance is combined it is called mixture.
• 10. The correct option is D)I, II, III, IV
• 11. The correct option is B) II and III only

Answer 2

The following are the answers;

8. A

9. D

10. C

11. A

Explanation:

8. Answer is A.

• Any substance that is composed of only one atom is called element.
• Compound, pure substance or mixture can have more than one atom present in them.

9. Answer is D.

• When one or more substance are combined it is called a mixture.
• Element or pure substance can not be a mix up pf one or more substance.
• Compound is formed by chemical reaction and not just comination.

10. Answer is C.

• Compound is made up by some chemical process and as two or more substances are used it does have more than one atom.

11. Answer is A.

• The element is made of one or more atom having same properties.
• Now it is nearly impossible to separate the element through any process.