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LEAFE

Bonjour,

Exercice 3 :

  • Z = q / e = 2,24 x 10⁻¹⁸ / 1,6 x 10⁻¹⁹ = 14 protons
  • A = m(atome) / m(nucléon) = 4,84 x 10⁻²⁶ / 1,67 x 10⁻²⁷ = 29 nucléons
  • N = A - Z = 29 - 14 = 15 neutrons

Exercice 4 :

  • 300 / 10⁵ = 0,003 m

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