An electron has a mass of $9.1 \times 10^{-31} \ kg$. It revolves around the nucleus in a circular orbit of radius $0.529 \times 10^{-10} \ m$ at a speed of $2.2 \times 10^6 \ m/s$. The magnitude of its linear momentum in this motion is:

  • A
    $1.1 \times 10^{-34} \ kg \cdot m/s$
  • B
    $2.0 \times 10^{-24} \ kg \cdot m/s$
  • C
    $4.0 \times 10^{-24} \ kg \cdot m/s$
  • D
    $4.0 \times 10^{-31} \ kg \cdot m/s$

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