Question:
Which one of the following statements is correct?
Which one of the following statements is correct?
Options:
- a) A neutron is formed by combination of an electron and a proton. Therefore, it is neutral.
- b) The mass of an electron is about 1/2000 times that of a proton.
- c) An isotope of cobalt is used in the treatment of goiter.
- d) J.J. Thomson proposed that the nucleus of an atom contains only neutrons.
- a) A neutron is formed by combination of an electron and a proton. Therefore, it is neutral.
- b) The mass of an electron is about 1/2000 times that of a proton.
- c) An isotope of cobalt is used in the treatment of goiter.
- d) J.J. Thomson proposed that the nucleus of an atom contains only neutrons.
correct answer : b)
Explanation:
The mass of an electron is approximately 1/1836 (or about 1/2000) of the mass of a proton. Statement (b) is correct.
The mass of an electron is approximately 1/1836 (or about 1/2000) of the mass of a proton. Statement (b) is correct.