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3826

Which of the following pairs of concepts constitutes complementary variables as expressess by the Heinsberg uncertainty principle?

  • A. Momentum and time
  • B. Energy and acceleration
  • C. Position and momentum
  • D. Velocity and Momentum
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3827

The nucleon number of an atom is the total number of

  • A. electrons and protons
  • B. electrons and neutrons
  • C. neutrons minus electrons
  • D. protons and neutrons
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3828
n = \(\alpha\) 0.06eV
E=3 -1.6eV
E=2 -3.7eV
E=1 -5.5eV
E=0 -10.4eV

The energy levels in the mercury atom is illustrated in the table above. Calculate the ionisation energy of the atom.

  • A. +21.2eV
  • B. +10.4eV
  • C. -10.4eV
  • D. -21.2eV
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3829

Which of the following statements about Gamma radiation is correct? Gamma radiation can

  • A. be seen by the naked eye
  • B. not pass through an aluminium foil
  • C. be present naturally in our surroundings
  • D. be used as a tracer
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3830
Radio wave Micro wave Infrared wave P Q R Gamma Ray

The table above shows the components of electromagnetic spectrum in order of increaasing frequency.Which of the following sets correctly identifies P, Q, R respectively?

  • A. Visible, ultraviolet, X-ray
  • B. X-ray, visible, ultraviolet
  • C. Ultraviolet, visible, X-ray
  • D. X-ray, ultraviolet, visible
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