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Samenvatting Natuurkunde hs5, STRALING. (Havo3) $6.06   Add to cart

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Samenvatting Natuurkunde hs5, STRALING. (Havo3)

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Dit is een samenvatting van hs5 straling. (Natuurkunde havo3). Paragraaf 1,2,3 en 4. Vanuit het boek (polaris) en aantekeningen uit de les samengevat.

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  • June 27, 2023
  • 1
  • 2022/2023
  • Summary
  • Secondary school
  • 3
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§ 5.3 Radioactiviteit.

Als stoffen zelf straling uitzenden, zijn ze radioactief.
De straling komt uit de atoomkern; kernstraling.



· X - Straling -> alfastraling. U - straling -> gammastraling (foton)
-




↳ Komt uit heliumkernen: ! He ↳elektromagnetisch: I
• zendt deeltjes uit p + en n° • Stoot energie uit; elektromagnetisch
veranderen: nieuwe kern kern veranderd niet
• Verval reactie: • Verval reactie:
atoom -> He + atoom (cijfers die atoom -> V+ atoom (cijfers die
begin kloppend maken) begin kloppend maken)



· B-straling -> betastraling.
↳ komt uit elektronen: e
• Zendt deeltjes uit p+ en n°
veranderen; nieuwe kern
• Verval reactie:
atoom -> e + atoom (cijfers die
begin kloppend maken)




§ 5.4 halveringstijd en activiteit.

De tijd waarin de hoeveelheid radioactieve stof halveert; halveringstijd.
Het aantal kernen die per seconde vervalen; activiteit van radioactieve stof
Eenheid = Bq (becquerel)
(Bv: per seconde vervallen er 100 kernen -> 100Bq.)
Eerst vervalt dus 50% (helft van 100%) dan 25% enzv.

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