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.
Answer:A
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.