Eight.
8.
A shape that has 77 sides is called a heptacontakaiheptagon. Naming polygons uses a combination of Greek prefixes and the suffix -gon.
vertex
A vertex and count the number of vertices in the polygon. That is the number which will be used for naming the polygon.
Aluminum oxide is an ionic compound. Prefixes are not used in naming ionic compounds, but are used in naming binary molecular compounds.
nothing
yOU START WiTH THE VERTEX.VERTEX iS THE ANSWER
This is a method to distinguish different compounds.
Ions combine in only one ratio, so prefixes are not needed.
vertex* * * * *Yes.
No, formulas of ionically bonded compounds can be figured out without prefixes and understanding of how many electrons are gained/lost. In covalent bonds, prefixes are needed and without them the formulas and quantities couldn't be determined.
vertex* * * * *Yes.