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1.0n the basis of Thomson’s model of an atom, explain, how the atom is neutral as a whole?, , 2.Where are electrons found in the atom?, 3. What are canal rays?, 3.Why is the nucleus of an atom positively charged?, , 4.Why did Rutherford select a gold foil in his a-ray, scattering experiment?, , 5. If Mg2+has 12 protons and 12 neutrons,what is its, atomic number and mass number? (CBSE 2010), , 6.What are the limitations of Rutherford's model of the, atom?, , 7.Define valency and Give an example of a monovalent, element., , 8.An atom of an element has 7 electrons in its L, shell,yname the element and write it's atomic number?, , 9.Why Mg atom gets 2+ charge when it loses two, electrons ?