State whether True or 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. Therefore, it is neutral.
(c) The mass of an electron is about $\frac{1}{2000}$ times that of a proton.

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Solution

(a) False. It was not proposed by J. J. Thompson. Thompson discovered the electron but not the nucleus.

(b) False. Because neutron is an independent sub-atomic particle.

(c) True. Mass of the electron $= 9.1 \times 10^{- 31}$ kg, which is about $\frac{1}{2000}$ times that of proton.

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Question 14
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 $\frac{1}{2000}$ times that of proton.
(d) An isotope of iodine is used for making tincture iodine, which is used as a medicine.

J.J. Thomson proposed that the nucleus of an atom contains only neutrons. True or False.

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

Q. For the following statements, write T for True and F for False.
A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.

A neutron is formed by an electron and a proton combining together and therefore, it is neutral.True or False.

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State whether True or 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. Therefore, it is neutral.(c) The mass of an electron is about 12000 times that of a proton.

(a) False. It was not proposed by J. J. Thompson. Thompson discovered the electron but not the nucleus.(b) False. Because neutron is an independent sub-atomic particle.(c) True. Mass of the electron=9.1×10−31 kg, which is about 12000 times that of proton.

State whether True or 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. Therefore, it is neutral.
(c) The mass of an electron is about $\frac{1}{2000}$ times that of a proton.

(a) False. It was not proposed by J. J. Thompson. Thompson discovered the electron but not the nucleus.

(b) False. Because neutron is an independent sub-atomic particle.

(c) True. Mass of the electron $= 9.1 \times 10^{- 31}$ kg, which is about $\frac{1}{2000}$ times that of proton.