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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 tinctures of iodine, which is used as a medicine.
(a) False.
Nucleons are the sub-atomic particles present in the nucleus of an atom, i.e., Protons and Neutrons. The model proposed by J.J. Thomson only contains Electrons and Protons, no neutrons.
(b) False.
A nucleon is formed by a neutron and a proton combining together. The neutron is a subatomic particle with no net electric charge and a mass slightly larger than that of a proton. Protons and neutrons, each with a mass of approximately one atomic mass unit, constitute the nucleus of an atom.
(c) True.
The mass of an electron is about 1/2000 times that of a proton.
(d) False.
Tincture of iodine is an antiseptic for the healing of wounds, it is also called weak iodine solution and is used as medicine. 5 – 7% iodine is dissolved in a mixture of alcohol and water to make this tincture of iodine and not an isotope of iodine.
Updated on: 14-Mar-2023
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