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For the following statements, write T for ‘True’ and F for ‘False’. 

(a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons. 

(b) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral. 

(c) The mass of an electron is about 1/2000 times that of proton. 

(d) An isotope of iodine is used for making tincture iodine, which is used as a medicine. 

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(a) J.J. Thomson proposed that the nucleus of an atom contains only nucleons. (F) 

(b) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral. (F) 

(c) The mass of an electron is about 1/2000 times that of proton. (T) 

(d) An isotope of iodine is used for making tincture iodine, which is used as a medicine. (T)

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