BPSC 67th Prelims Exam 08 May 2022 Solved Paper

Question : 17 of 150

Marks: +1, -0

Which among the following is an incorrect option?

Atom is electrically neutral due to presence of protons and electrons inside the nucleus
Electrons are negatively charged and have negligible mass.
Atomic number is the number of protons in an atom of an element.
Isotopes are useful as nuclear fuel, in medical field, in carbon dating, etc.
None of the above/More than one of the above

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