Understanding Ionic Compounds and Charges

What is the charge of nitrogen when it forms an ionic compound with earth metals?

• Positive 2

• Negative 3

• Positive 3

• Negative 2

Which method is described as 'crisscross applesauce' for balancing ionic charges?

• Boiling method

• Crisscross method

• Valence electron method

• Lewis dot structure

In the crisscross method, what do you crisscross?

• The charges

• The elements

• The numbers

• The electrons

What is the first step in writing the chemical formula for aluminum and sulfur?

• Draw the Lewis dot structure

• Use the boiling method

• Apply the crisscross method

• Determine the charges of aluminum and sulfur

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