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4096

Which of the following statements is correct about ionization energy? It

  • A. decreases across the periods
  • B. results in the formation of an anion
  • C. causes Metalic nuclei to disintegrate
  • D. decreases down the group
View Answer & Discuss (2) WAEC 2021
4097

Potassium trioxonitrate (V) can be obtained from its solution by----------

  • A. distillation
  • B. evapoartion
  • C. crystallization
  • D. filtration
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4098

An element, Q, contains 69% of\(^{63}\)Q and 31% of \(^{65}\)Q. What is the relative atomic mass of Q?

  • A. 63.0
  • B. 63.6
  • C. 65.0
  • D. 69.0
View Answer & Discuss (2) WAEC 2021
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4099

The following ions have the same electron configuration except 

\(_{8}\)O, \(_{12}\)Mg, \(_{13}\)AI, \(_{17}\)CI

  • A. CI\(^{-}\)
  • B. O\(^{2-}\)
  • C. Mg\(^{2+}\)
  • D. AI\(^{3+}\)
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4100

The region around the nucleus where electrons can be located is called?

  • A. a spectra
  • B. an orbital
  • C. a quanta
  • D. a field
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