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Samenvatting scheikunde hoofdstuk 3 havo 3 {NOVA}

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Paragraaf 3.1 t/m 3.4 Door middel van tekstboek en uitleg docent Bevat plaatjes en uitleg met voorbeeld opdracht

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3.1
Stoffen  moleculen  atomen
Stoffen ontstaan doordat atomen met andere atomen reageren


Atomaire massa-eenheid (u) eenheid waarin de massa van protonen en
neutronen wordt uitgedrukt
deeltje plaats lading
+
proton (p ) atoomkern 1+ (positief)
neutron (n) atoomkern 0
elektron (e-) schillen 1- (negatief)


Elektronenschillen: K-, L- en M-schil
K: max 2 elektronen
L: max 8 elektronen
M: max 18 elektronen




Atomen hebben atoomnummer  komt overeen met aantal protonen in de kern
Massagetal = aantal protonen + aantal neutronen

Het aantal neutronen in de kern kan verschillen terwijl het aantal protonen hetzelfde
is, het massagetal is dus anders  isotopen
Om isotopen van elkaar te onderscheiden vermeld je het massanummer (bijv. Ne-20)


Periodiek systeem
18 groepen  staan bovenaan vermeld
Groep 18 edelgassen  reageren nauwelijks met andere stoffen
Groep 17  halogenen: niet-ontleedbare stoffen die gemakkelijk reageren met
metalen
7 periodes (rechts vermeld)  aantal schillen om de kern

De atoomsoorten zi jn ingedeeld in metalen en niet-metalen
Metalen (links, geel)  hoog smelt- en kookpunt, glanzend uiterlijk, vervormbaar bij
hoge temperatuur
Niet-metalen (rechts, blauw)  laag smelt- en kookpunt, vaak gasvormig
Metalloïden (roze)  gedragen zich soms als metalen en soms als niet-metalen

Connected book
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Publisher: Unknown ISBN: 9789402068795 Edition: Unknown

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Level
School year
3
Summarized whole book?
No
Which chapters are summarized?
Hoofdstuk 3
Uploaded on
April 20, 2023
Number of pages
4
Written in
2021/2022
Type
Summary
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