Writing Ionic Formulas with Polyatomic Ions

This video tutorial explains how to write chemical formulas for ionic compounds. It covers examples with equal and unequal charges, including those involving polyatomic ions and transition metals with Roman numerals. The tutorial provides step-by-step instructions and examples to help learners understand the process of writing chemical formulas, including complex cases with charge reduction.

How do you determine the subscript for sodium in sodium sulfide?

• By reversing the charges

• By adding the charges

• Based on the charge of sodium

• Based on the charge of sulfide

What is the formula for lithium chloride?

• Li2Cl2

• Li2Cl

• LiCl

• LiCl2

What is the charge of alkali metals when they become ions?

• -2

• -1

• +2

• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the formula for calcium sulfide?

• CaS2

• CaS

• Ca2S

• Ca2S3

How do you write the formula for magnesium bromide when the charges are different?

• MgBr2

• MgBr

• Mg3Br2

• Mg2Br3

What subscript is used for bromine in magnesium bromide?

• 4

• 2

• 3

• 1

What is the correct formula for aluminum sulfate?

• Al3SO4

• Al2(SO4)3

• Al2SO4

• Al(SO4)2

What is the charge on sulfate in aluminum sulfate?

• -1

• +1

• -2

• +2

What is the correct formula for strontium phosphate?

• SrPO4

• Sr2PO4

• Sr(PO4)3

• Sr3(PO4)2

What is the charge on phosphorus in calcium phosphide?

• +2

• -2

• -3

• +3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2