Q46 of 149 Page 192

Compare an electron, a proton and a neutron in respect of their relative masses and charges.

The relative mass of electron is 1/1840 u, and the relative mass of proton and the neutron is 1 u each.


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44

Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element?

 45

What is a neutron? State its relative mass and charge.

 47

What is a proton? How does it differ from a neutron?

 48

Compare an electron and a proton in respect of mass and charge.