Mastering Polyatomic Ions with Nick the Camel

The video tutorial explains how to write chemical formulas using polyatomic ions by applying the crossover rule. It emphasizes the importance of identifying metals and non-metals, using brackets for polyatomics, and simplifying the resulting formula. Two examples, iron(II) phosphate and magnesium sulfate, are provided to illustrate the process. The tutorial highlights the significance of recognizing polyatomic ions by their 'ate' ending and the correct placement of charges and brackets.

What is the first step in writing chemical formulas using polyatomics?

• Write the charges

• Identify the metal and non-metal

• Simplify the numbers

• Remove the ones

What does the 'at' ending in a chemical name indicate?

• It is a transition metal

• It is polyatomic

• It is a non-metal

• It is a metal

What is the chemical symbol for iron?

• Fe

• I

• Ir

• In

In the crossover rule, where should the charge be placed for polyatomics?

• Outside the brackets

• Next to the non-metal

• Next to the metal

• Inside the brackets

What is the chemical formula for iron(II) phosphate?

• Fe3(PO4)2

• Fe(PO4)2

• Fe2(PO4)

• Fe2(PO4)3

Why are brackets important in chemical formulas involving polyatomics?

• They indicate the charge

• They show the number of polyatomics

• They separate metals and non-metals

• They are not important

What is the chemical symbol for magnesium?

• Mn

• M

• Mg

• Ma

What is the chemical formula for magnesium sulfate?

• MgSO3

• Mg(SO4)2

• MgSO4

• Mg2SO4

When can brackets be removed in a chemical formula?

• When the charge is zero

• When the polyatomic is a non-metal

• When the polyatomic is a metal

• When the number outside the brackets is one

What is the charge of sulfate in the example given?

• -1

• +2

• -2

• +1