atoombouw aantal
④- massagetal
H
⑳
~ protonen #
O atoomnummer
2
neutronen -
⑪ massagetal
atoom-ondeelbaar OH
elektronenwoande
altijd-
even
protonen
+
elektronen Latoomnummer - aantal protonen
t --
1
- --
-
↳ massa 1 Unit "
"
.....
de
L max
=
,
↑
elektron
&
&
te - =
M
. max
↳ massa --- ↑
=
O (verwaarloosbaar schillen
~
tabel 25 binas elektronen zijn altijd gelijk aan protonen
isotopen -
zelfde aantal protonen
↳ perschil
in aantal neutroneno
zelfde
atomen radioactief de kern kan zich dan
sommige splitsen
wanneer de atoomkernsplitst verdwijnen
,
er soms protonen en neutronen uit de Kern
G doordat er dan minder protonen in de kern achterblijven krijg je
,
een ander atoomsoort
van lood naar goud
, paragraaf 1 2
.
periodiek systeem der elementen
het periodieu systeem
-groep 1-> alkalimetalen
,I reactief
-
groep 2-aardnalimetalen ,
2 reactief
groep halogenen
17-
-
atomen rechts in periodiek systeem > niet-metalen
-
horizontale rijen -
periodes
verticale rijen -
groepen
atoomsoorten in dezelfde groep hebben vergelijkbare eigenschappen
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