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Which of the following representations is correct for an atom X with 28 electrons and...

Physics
WAEC 2004
Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?
  • A. \(^{30}_{28} X\)
  • B. \(^{28}_{30} X\)
  • C. \(^{58}_{30} X\)
  • D. \(^{58}_{28} X\)
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Correct Answer: Option D
Explanation
\(X^{A = p + n = 28 + 30 = 58}_{Z = P = E = 28}\)
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now