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JIPMER 2011
Exam
JIPMER
Year
2011
Subject
Chemistry
Chapter
Structure of Atom

JIPMER 2011 · Chemistry · Structure of Atom

The number of electrons, neutrons and protons in a species are...

The number of electrons, neutrons and protons in a species are equal to 10,8 and 8 respectively. The proper symbol of the species is

Options

  1. A816O{ }_8^{16} \mathrm{O}
  2. B818O{ }_8^{18} \mathrm{O}
  3. C1018Ne{ }_{10}^{18} \mathrm{Ne}
  4. D816O2−{ }_8^{16} \mathrm{O}^{2-}

Correct answer

D. 816O2−{ }_8^{16} \mathrm{O}^{2-}

Step-by-step solution

From the given data, it is clear that the atomic number, ZZ or number of protons of the species is 8 . Number of neutrons is also 8, hence atomic mass is 16. Since, the number of electrons are two more than the number of protons, hence it is a binegative species. Thus, the species is 816O2−{ }_8^{16} \mathrm{O}^{2-}.
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