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Samenvatting Scheikunde atomen en moleculen (nova)

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Secondary school
Level
VWO / Gymnasium
Course
Scheikunde
School year
3
All documents for this subject (2400)

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Uploaded on
June 6, 2022
Number of pages
5
Written in
2021/2022
Type
Summary

Subjects

  • scheikunde
  • atomen
  • moleculen
  • massagetal
  • bohr diagram
  • structuur formule
  • atoommassa
  • molecuul massa
  • rekenen met mol
  • molaire massa

Content preview

Scheikunde pww 2
2021 // atomen en moleculen

wat? lading? waar?
proton 1+ atoomkern
neutron 0 atoomkern
elektron 1- elektronenwolk

Stoffen opgebouwd uit moleculen. Moleculen zijn opgebouwd uit atomen.
Atoomnummer = aantal protonen = aantal elektronen
Massagetal = aantal protonen + aantal neutronen
(massagetal - atoomnummer = aantal neutronen)
Isotopen = atomen van hetzelfde element met een verschillend aantal
neutronen in de kern.


12,01 = relatieve atoommassa
c = symbool voor de stof
6 = atoomnummer
2,4 = elektronenconfiguratie.

31
15 P → 15 protonen
15 elektronen
31 - 15 = 16 neutronen




groepen = de verticale kolommen in het periodiek systeem
perioden = de horizontale kolommen in het periodiek systeem

, Bohr - diagram:

a) O (zuurstof)


8O
2,6




b) Li (lithaan)


3Li
2,1




c) Ne (neon)


10 Ne
2,8




Covalentie = aantal bindingen dat een atoom heeft
Edelgassen = vormen geen moleculen (covalentie 0)
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