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Formula and equations - 2.3 - (2)
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Total cards: 8•Content version: v3•Public deck•Updated: 8/1/2026
Card preview (8)
#1
Front (Question)
What are polyatomic ions?
Back (Answer)
ions that contain atoms of more than one element bonded / joined together
#2
Front (Question)
What does an ionic compound contain?
Back (Answer)
a cation and an anion
#3
Front (Question)
How can the formula be worked out?
Back (Answer)
from the charge on each ion
#4
Front (Question)
Writing formulae from ions: The overall charge is zero so…
Back (Answer)
the ionic charges must balance
#5
Front (Question)
Writing formulae from ions: Sum of positive charges = …
Back (Answer)
sum of negative charges
#6
Front (Question)
What is the number of each ion present shown as?
Back (Answer)
a subscript after the ion
#7
Front (Question)
The ionic charges are usually omitted…
Back (Answer)
in the completed formula
#8
Front (Question)
When are brackets used?
Back (Answer)
if there is more than one polyatomic ion