key questions/info Flashcards
1
Q
why are some substances stored in brown bottles
A
some substances are stored in brown bottles because dark colours interrupt the light and act as a filter which prevents any reactions
2
Q
the 4 main element groups
A
alkali metals, alkaline earth metals, halogens, noble gases
3
Q
why are noble gases unreactive
A
the atoms of noble gases have complete outer shells so they have no tendency to lose, gain, or share electrons. noble gases do not take part in chemical reactions
