UE9 Rayon Flashcards

1
Q

Masse-énergie d’un électron ?

A

9,1.10^-31 kg = 55.10^-5 u = 0.511 MeV

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2
Q

Masse-énergie d’un proton ?

A

1,6727 ^-27 kg = 10076 u = 938 MeV

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3
Q

Masse-énergie d’un neutron ?

A

1,6747.10^-27 kg = 10090 u = 939 MeV

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4
Q

Variation de dm ?

A

dE=dmc^2

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5
Q

Diminution de masse…

A

Diminue l’énergie et libère l’énergie rendu disponible

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6
Q

Augmentation de masse

A

Augmente l’énergie du système et nécessite un apport en énergie

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7
Q

Défaut de masse ?

A

Diff entre masse entre nucléons à l’état lobre et les mêmes nucléons liés au noyau
Delta m= Z.mp+N.mn-M

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8
Q

Expression de la masse atomique

A

Delta m= Z.mp+N.mn-(M-Z.me)

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9
Q

Énergie liaison

A

EL= Delta m ×c^2

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10
Q

Plus EL / A est élevé…

A

Plus les noyaux sont stables

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11
Q
A
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