10 SECTION B – Module C4 4
This question is about atomic structure. (a) An atom of chlorine can be represented as: 35 17
Cl
Complete the following sentence. This atom of chlorine contains ............. protons, 17 electrons and ............. neutrons.
[2]
(b) Complete the table about the particles found in atoms. Particle
Relative electric charge
Relative mass
Electron
........................
0.0005
Neutron
........................
1
Proton
+1
........................ [2] [Total: 4]
Š OCR 2013