Question Paper
Class / Subject: Class 8 (ICSE) · Science
Chapter: Chapter 12 — Chapter 12: Atomic Structure
Time Allowed: 32 minutes
Max Marks: 16
1. What is found in the nucleus? [1]
(A) Protons and neutrons
(B) Only electrons
(C) Only protons
(D) Nothing
2. What charge do protons have? [1]
(A) Positive
(B) Negative
(C) No charge
(D) Variable charge
3. What charge do neutrons have? [1]
(A) No charge
(B) Positive
(C) Negative
(D) Variable charge
4. What charge do electrons have? [1]
(A) Negative
(B) Positive
(C) No charge
(D) Variable charge
5. What does the atomic number represent? [1]
(A) The number of protons
(B) The number of neutrons
(C) The number of electrons only, without protons
(D) The total mass
6. What is the mass number? [1]
(A) Protons + neutrons
(B) Protons only
(C) Neutrons only
(D) Electrons only
7. What are valence electrons? [1]
(A) Electrons in the outermost shell
(B) Electrons in the nucleus
(C) Protons in the nucleus
(D) Neutrons in the nucleus
8. Why understand atomic structure? [1]
(A) It explains chemical bonding and the periodic table
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is found in the nucleus? [1]
(A) Protons and neutrons
(B) Only electrons
(C) Only protons
(D) Nothing
10. What charge do protons have? [1]
(A) Positive
(B) Negative
(C) No charge
(D) Variable charge
11. What charge do neutrons have? [1]
(A) No charge
(B) Positive
(C) Negative
(D) Variable charge
12. What charge do electrons have? [1]
(A) Negative
(B) Positive
(C) No charge
(D) Variable charge
13. What does the atomic number represent? [1]
(A) The number of protons
(B) The number of neutrons
(C) The number of electrons only, without protons
(D) The total mass
14. What is the mass number? [1]
(A) Protons + neutrons
(B) Protons only
(C) Neutrons only
(D) Electrons only
15. What are valence electrons? [1]
(A) Electrons in the outermost shell
(B) Electrons in the nucleus
(C) Protons in the nucleus
(D) Neutrons in the nucleus
16. Why understand atomic structure? [1]
(A) It explains chemical bonding and the periodic table
(B) No reason
(C) It's not useful
(D) Only for tests