WBCS.LIVE practice question

The ion of an element has three positive charge. Mass number of the atom is 27, and the number of neutrons is 14. What is the number of electrons in the ion?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 13
  2. 10
  3. 14
  4. 16

Correct answer and explanation

Correct answer: 10

Explanation: āœ… Correct Answer: B) 10 šŸ“š Explanation: The mass number is 27 and there are 14 neutrons, so there are 13 protons. An atom with 13 protons normally has 13 electrons. Because the ion has a +3 charge, it has lost 3 electrons, leaving only 10. This gives the ion a stable electronic structure like the gas Neon.