CIE iGCSE Co-Ordinated Science C2.2 Atomic structure and the Periodic Table Exam Style Questions Paper 1
Question
The structures of some substances are shown.
Which row shows the total number of different elements and the total number of atoms in the three structures?
| Option | Total Number of Different Elements | Total Number of Atoms |
|---|---|---|
| A | 3 | 9 |
| B | 3 | 17 |
| C | 7 | 9 |
| D | 7 | 17 |
▶️Answer/Explanation
Answer: B
Explanation: The three substances contain 3 different elements (H, C, O) and a total of 17 atoms (2 in H₂O, 9 in C₂H₅OH, and 6 in CH₄).
Question
The protons, neutrons, and electrons in a particle are shown.
Which symbol represents this particle?
A. F
B. F⁻
C. Ne
D. Ne⁺
▶️Answer/Explanation
Answer: B. F⁻
Explanation: The particle has 9 protons (fluorine), 10 neutrons, and 10 electrons. Since it has one more electron than protons, it is a fluoride ion (F⁻).
Question
Which row does not link a general physical property to the type of element?
▶️Answer/Explanation
Ans : C
Question
An atom of an element contains 9 protons, 10 neutrons and 9 electrons.
What is the nucleon number (mass number) of this element?
(A) 9
(B) 10
(C) 19
(D) 28
▶️Answer/Explanation
Ans: C