Polyatomic Ion Rules

What is the difference between an ion that ends in -ate and an ion that ends in -ite?

• -ate has one more oxygen than -ite.
• -ite has one more oxygen than -ate.
• -ate has 3 oxygens; -ite has 2 oxygens.
• -ate has a more negative charge than -ite.

What does a Roman numeral tell you about a cation?

• how many of the cation are in the formula
• the charge on the ion
• the number of different ions of that eement there are
• whether it is positive or negative

What does the prefix bi- tell you about an ion?

• there are two of something in the formula
• the ion contains hydrogen
• the ion contains oxygen
• there are 3 oxygens in the fomrula

When an ion ends in -ate or -ite, it always contains what element?

• hydrogen
• carbon
• chlorine
• oxygen

The cation that ends in -ous always has a _______ charge than the cation that ends in -ic.

• lower
• higher

An ion with the prefix per- has 1 ____ oxygen than the ion without that prefix.

• more
• less

HPO₄^-2 could be called

• biphosphate
• perphosphate
• hypophosphate
• phosphide

SiO₄^-4 is probably named

• siliconide
• silicate
• bisilicate
• siliconoxide