NECO offline past questions - All questions, answers & explanations in one app 25712
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136
A particle that contains 9 protons, 10 neutrons and 10 electrons is a
  • A. negative ion
  • B. positive ion
  • C. neutral atom of non-metal
  • D. neutral atom of a metal
View Answer & Discuss (7) JAMB 2001
137

Cancerous growths are cured by exposure to

  • A. γ - rays
  • B. β - rays
  • C. α - rays
  • D. infrared rays
View Answer & Discuss (22) JAMB 2001
138

An oxide XO2 has a vapour density of 32. What is the atomic mass of X?

  • A. 32
  • B. 20
  • C. 14
  • D. 12
View Answer & Discuss (2) JAMB 2001
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NECO offline past questions - All questions, answers & explanations in one app 25712
139
Millikan's contributions to the development of atomic theory is the determination of
  • A. charge on electron
  • B. positive rays
  • C. charge to mass ratio
  • D. cathode rays
View Answer & Discuss (5) JAMB 2001
140
Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?
  • A. X
  • B. W
  • C. Z
  • D. Y
View Answer & Discuss (8) JAMB 2001
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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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