Criss Cross Method

What is this called?

• anion change

• ion charge change

• Criss-cross method

• cation change

What is the criss-cross method used for in chemistry?

• To balance chemical equations

• To determine the formula of ionic compounds

• To predict the shape of molecules

• To calculate molar mass

Using the criss-cross method, what is the formula for a compound formed between aluminum (Al) and oxygen (O)?

Which of the following steps is involved in the criss-cross method for writing chemical formulas?

• Balancing the charges of ions

• Swapping the charges of ions

• Adding subscripts to balance mass

• Using coefficients to balance atoms

What is the charge on the sulfate ion used in the criss-cross method?

• +1

• -1

• -2

• +2

Using the criss-cross method, what is the formula for a compound formed between calcium (Ca) and nitrate (NO3)?

In the criss-cross method, what happens if the resulting subscripts are the same for both elements?

• The subscripts are reduced to their simplest form

• The subscripts are doubled

• The subscripts are left unchanged

• The compound is considered unstable

Using the criss-cross method, what is the formula for a compound formed between magnesium (Mg) and chloride (Cl)?

Which of the following compounds can be correctly written using the criss-cross method?

Tags

NGSS.MS-PS1-1

Using the criss-cross method, what is the formula for a compound formed between iron (III) (Fe) and sulfate (SO4)?