Question

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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.


✰If any is false give the reason why it is false.



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Answer 1

Answer:

A) False

B) False

C) True

D) False

Explanation:

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Answer 2

Answer:

a. false

J.J. Thomson proposed the model of the atom that only contains electrons and protons and no neutrons. Thus, the given statements is incorrect. Hence, answer is False

b. false , Thomson proposed that the nucleus of an atom contains only nucleons. (ii) A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.

c. true, Electrons are extremely small. The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom. Electrons have an electric charge of −1, which is equal but opposite to the charge of a proton, which is +1.

d. false , The isotope used is Iodine-127 since it isthe only stable isotope of Iodine.

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