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1966

\(_8\)X\(^{2-}\) and \(_{10}\)Y are 

  • A. isomers
  • B. isotopes
  • C. allotropes
  • D. isoelectronic
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1967

Pure water contaminated with quicklime will have a pH of 

  • A. 1
  • B. 6
  • C. 7
  • D. 8
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1968

The electron configuration of \(_{29}\) Cu is 

  • A. 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^6\) 4S\(^1\) 3d\(^{10}\)
  • B. 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^6\) 4S\(^3\) 3d\(^9\)
  • C. 1S\(^2\) 2S\(^2\) 2P\(^5\) 3S\(^2\) 3P\(^6\) 4S\(^2\) 3d\(^{10}\)
  • D. 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^2\) 4S\(^1\) 3d\(^{10}\)
View Answer & Discuss (4) WAEC 2024
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1969

When s and p block elements react, the bond formed is

  • A. electrovalent
  • B. covalent
  • C. metallic
  • D. dative-covalent
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1970

The hardest form of carbon is 

  • A. charcoal
  • B. coke
  • C. diamond
  • D. graphite
View Answer & Discuss (2) WAEC 2024
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