Chemical Compounds and Ions

The video tutorial covers polyatomic ions, which are groups of covalently bonded atoms with a charge. It explains their role in forming ionic compounds and provides examples like sulfate, nitrate, and acetate. The tutorial also covers naming conventions for compounds containing polyatomic ions and how to write their chemical formulas, emphasizing the importance of charge balance and the use of Roman numerals for transition metals.

What is the charge of the sulfate ion?

• +1

• -2

• -1

• +2

Which of the following is a polyatomic ion?

• SO4

• NaCl

• O2

• H2O

In an ionic compound, a polyatomic ion with a negative charge will most likely bond with which type of ion?

• A positive ion

• Another negative ion

• A neutral molecule

• A noble gas

What is the formula for sodium chlorate?

• NaClO3

• NaCl

• Na2SO4

• Na2CO3

How does a polyatomic ion differ from a molecule?

• It has a charge

• It is always neutral

• It contains only metals

• It is a single atom

What is the charge of the sulfite ion?

• +1

• -1

• -2

• +2

When naming a compound with a transition metal, what is used to indicate the metal's charge?

• Arabic numerals

• Roman numerals

• Chemical symbols

• Greek letters

What is the name of the compound with the formula KNO3?

• Potassium sulfate

• Potassium chloride

• Potassium nitrite

• Potassium nitrate

When writing chemical formulas, what is used to indicate multiple polyatomic ions?

• Brackets

• Parentheses

• Commas

• Dashes

How many acetate ions are needed to balance one aluminum ion in a compound?

• 1

• 2

• 4

• 3