Question 1:
Diagram 1.1 shows the structure of an atom.
(a) P and Q are subatomic particles.
Name P and Q. [2 marks]
(b) What is the charge of P? [1 mark]
(c) What is the nucleon number of this atom? [1 mark]
(d) Diagram 1.2 shows the structure of three atoms.
(i) Which atoms are isotopes? [1 mark]
Mark (\/) your answers in the box provided in Diagram 1.2.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/07/Picture22.png)
(ii) Based on Diagram 1.2, complete the sentence below.
Isotopes are atoms of an element which have different number of nucleons but the same number of ______________. [1 mark]
Answer:
(a)
P: Electron
Q: Neutron
(b) Negative
(c) 13
(d)(i)
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/07/Picture23.png)
(d)(ii) Protons
Diagram 1.1 shows the structure of an atom.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/07/Picture21.png)
Name P and Q. [2 marks]
(b) What is the charge of P? [1 mark]
(c) What is the nucleon number of this atom? [1 mark]
(d) Diagram 1.2 shows the structure of three atoms.
(i) Which atoms are isotopes? [1 mark]
Mark (\/) your answers in the box provided in Diagram 1.2.
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/07/Picture22.png)
(ii) Based on Diagram 1.2, complete the sentence below.
Isotopes are atoms of an element which have different number of nucleons but the same number of ______________. [1 mark]
Answer:
(a)
P: Electron
Q: Neutron
(b) Negative
(c) 13
(d)(i)
![](http://spmscience.blog.onlinetuition.com.my/wp-content/uploads/sites/10/2019/07/Picture23.png)
(d)(ii) Protons