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The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? Correct Answer 10

The correct answer is 10.

Key Points

  • Mass number (A) of the atom = 27
  • Number of the neutron in the atom =14
  • Number of Electrons=Mass number-Number of neutrons=27-14
  • Number of electrons= 13
  • Since, the ions of the element have 3 positive charges.
  • Therefore, the number of the electron in the ion is 13-3=10
  • Hence, the answer is 10

Additional Information

  • Mass Number:
    • Mass number is always equal to the sum of the number of protons and the number of neutrons.
    • The mass number determines the Atomic mass of an atom.
    • An atomic number of an element is the number of protons present in the nucleus of an atom.
    • Mass Number is denoted by A, while Atomic Number is denoted by Z.
    • Mass Number  = Number  of Protons + Number of  Neutrons.
  • Atomic number
    • It represents the number of protons and hence the number of electrons in an atom.
    • The number of electrons in an atom governs its chemical behavior.
    • The number of protons present in the nucleus of an atom is called the atomic number.
    • It is represented by Z.
    • It has been established that the charge of a proton is equal but opposite to that of an electron.

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