making molecules: the crossover rule Flashcards
1
Q
when writing ions side to side, which ion goes first
A
metals
2
Q
what happens when both ions have the same charge number/denominator
A
they disappear
3
Q
what would this be:
Ca^+2 & O^+2
A
CaO
(2s disappear)
4
Q
how is a polyatomic ion crossover done
A
the polyatomic ion is put in brackets
5
Q
how would this polyatomic ion crossover be done:
Mg^+2 & NO3^-1
A
Mg(NO3)2
