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Model Paper 2 — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceModel Paper 23 Marks
Question
Compare the properties of electrons, protons and neutrons.
✓

Answer

ProtonNeutronElectron
(i) It is positively-charged sub-atomic particle.(i) It is neutral sub-atomic particle.(i) It is negatively-charged sub-atomic particle.
(ii) Its mass is equivalent to a hydrogen atom i.e. 1 a.m.u(ii) It mass is equal to the mass of a proton.(ii) Its mass is 1/1838 of the mass of a proton.
(iii) It is present inside the nucleus of an atom.(iii) It is also found inside the atomic nucleus.(iii) It is found outside the nucleus of an atom.

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