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Chemistry 2008 WAEC Past Questions

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1
The mass spectrometer can be used to measure mass of
  • A. an atom
  • B. an electron
  • C. a proton
  • D. a neutron
View Answer & Discuss (2) WAEC 2008
2
Find the number of neutrons in an atom represented by 4521X.
  • A. 21
  • B. 24
  • C. 45
  • D. 66
View Answer & Discuss (1) WAEC 2008
3
The valence electrons in a chloride ion are [17CI]
  • A. 2p electrons only
  • B. 3s and 3p electrons only
  • C. 3p and 3d electrons only
  • D. 3p electrons only
View Answer & Discuss (4) WAEC 2008
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC offline past questions - with all answers and explanations in one app - Download for free
4
What is the atomic number of an element whose cation Y+ has the electronic configuration 1s22s22p6?
  • A. 9
  • B. 10
  • C. 11
  • D. 12
View Answer & Discuss (12) WAEC 2008
5

Atom \(^{234} _{88} Q\) decay by alpha emission to give an atom R. The atomic number and mass number of atom R are respectively

  • A. 86 and 230
  • B. 87 and 234
  • C. 88 and 233
  • D. 90 and 238
View Answer & Discuss (4) WAEC 2008
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC offline past questions - with all answers and explanations in one app - Download for free