IGCSE O Level Chemistry Online Tests
Protons, Neutrons and Electrons MCQ (Multiple Choice Questions) PDF Download
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Protons, Neutrons and Electrons MCQs: Questions and Answers PDF Download
In the periodic table, the period number indicates the number of
- neutrons
- protons
- electrons
- photons
Chemical properties of an element are largely derived through the
- position in the periodic table
- proton number of an element
- nucleon number of element
- number of valence electrons
What is correct about electrons?
- they have negligible mass
- they have relative charge of -1
- their charge is opposite and equal to a proton
- all of above
Mass of an electron is
- 1⁄1840 of a proton only
- 1⁄1840 of a neutron only
- 1860 times of a proton
- 1⁄1840 of a proton and neutron
Helium (He) is not an inert gas because it has
- higher chemical reactivity only
- half shell of valence electrons only
- no electrons
- higher chemical reactivity and half shell of valence electrons
IGCSE O Level Chemistry Practice Tests
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