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Samenvatting H1 Chemisch rekenen §1 t/m 4 Nova scheikunde 4 Vwo FLEX-boek $3.77   Add to cart

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Samenvatting H1 Chemisch rekenen §1 t/m 4 Nova scheikunde 4 Vwo FLEX-boek

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Samenvatting H1 §1 t/m 4 Nova scheikunde 4 Vwo FLEX-boek over het onderwerp Chemisch rekenen incl. plaatjes en formules.

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  • October 8, 2022
  • 4
  • 2022/2023
  • Summary
  • Secondary school
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H1 CHEMISCH REKENEN SCHEIKUNDE 4 VWO.

§1.1 Atoombouw en periodiek systeem

Volgens atoommodel bestaat een atoom uit positief geladen atoomkern met in
elektronenschillen daaromheen bewegende, negatief geladen elektronen. In elke schil past
een specifiek aantal elektronen: van binnen naar buiten telkens meer.
- Atoomkern: positief geladen protonen, daartussen ongeladen neutronen; hebben
positieve lading, bepalen massa atoom, maar hebben geen invloed op
eigenschappen. Massa neutron = massa proton. Massa elektron verwaarloosbaar in
vergelijking met massa proton/neutron. Worden allemaal uitgedrukt in de atomaire
massa-eenheid, u (unit) -> 1,00 u = 1,66 x 10–27 kg.




Tussen atoomkern/elektronen zit lege ruimte. Grootte atoom > elektronenwolk.




 Atoomnummer = aantal protonen = aantal elektronen > atoom = elektrisch neutraal.
 Massagetal = aantal protonen + aantal neutronen.

Aantal protonen in atoomkern bepaalt tot welk element het atoom behoort.

Isotopen; atomen van hetzelfde element met een verschillend aantal neutronen > hetzelfde
atoomnummer, maar verschillende massagetallen. Hoeveelheid elektronen bepaalt
chemisch gedrag atoom, dus isotopen hebben dezelfde chemische eigenschappen. Ze
worden als volgt genoteerd:

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