Označeno: kemijske vezi

20. 09, 21

Lastnosti snovi

vir: https://www.google.com/search?q=premog&tbm=isch&ved=2ahUKEwib7sGG-Y3zAhUoz7sIHQOYA-MQ2-cCegQIABAA#imgrc=eYdI0KlPNbWsrM

18. 12, 20

Kemijske vezi

Viri slik: https://www.youtube.com/watch?app=desktop&v=g-tE6MN-wrE, http://www.phschool.com/science/biology_place/biocoach/biokit/bonds.html