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ICSE Class 10 Answered

<div><strong>Does the atomic number of an elment changes when its atoms form ions ? <span style="text-decoration: underline;">Give reason of your answer.</span></strong></div>
Asked by soumen_tiku | 27 Oct, 2015, 11:46: PM
Expert Answer
  • No, the atomic number of an element does not change when it forms ion.
  • In an isolated neutral atom, total number of protons is equal to total number of electrons revolving around the nucleus.
  • Atomic number = Total number of protons in the nucleus.
  • When an atom forms an ion by loss or gain of electrons, the number of electrons revolving around the nucleus changes.
  • But the total number of protons remains the same.
  • Hence, the atomic number of the element does not changes when it forms ion.
Answered by Prachi Sawant | 28 Oct, 2015, 09:53: AM
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