CIE iGCSE Co-Ordinated Science P5.1 The nucleus Exam Style Questions Paper 1
Question
The table gives information about four nuclides P, Q, R and S. Which nuclides are isotopes of the same element?
| nuclide | number of protons | number of neutrons |
|---|---|---|
| P | 81 | 123 |
| Q | 82 | 122 |
| R | 82 | 123 |
| S | 83 | 121 |
A) P and Q
B) P and R
C) Q and R
D) Q and S
▶️Answer/Explanation
Answer: C) Q and R
Explanation: Isotopes of the same element have the same number of protons but different numbers of neutrons. Q and R both have 82 protons, making them isotopes of the same element.
Question
An atom of beryllium is represented by 4 9Be.
How many neutrons are in the nucleus of this type of beryllium atom?
A 4 B 5 C 9 D 13
▶️Answer/Explanation
Ans :A
Question
An atom of beryllium is represented by An atom of beryllium is represented by4 9Be.
How many neutrons are in the nucleus of this type of beryllium atom?
A 4 B 5 C 9 D 13
▶️Answer/Explanation
Ans : B
Question
The nucleus of an isotope of gold contains 79 protons and 118 neutrons. The symbol for gold is Au.
What is the nuclide symbol for this isotope?
A \( _{118}^{79}\textrm{Au}\)
B \( _{197}^{79}\textrm{Au}\)
C \( _{79}^{118}\textrm{Au}\)
D \( _{79}^{197}\textrm{Au}\)
▶️Answer/Explanation
Ans : D