Understanding Ionic Compounds

What is the primary focus when determining the formula of an ionic compound?

• The number of atoms in the compound

• The ratio of ions in the ionic lattice

• The color of the compound

• The physical state of the compound

In the formation of lithium fluoride, what charge does lithium typically form?

• 2+

• 1-

• 1+

• 2-

Why does calcium fluoride require two fluorine atoms for every calcium atom?

• Fluorine atoms need to balance the charge of calcium

• Calcium atoms are more reactive

• Calcium atoms need to gain electrons

• Fluorine atoms are larger than calcium atoms

What is the charge of the hydroxide ion?

• 1+

• 2-

• 1-

• 2+

Which of the following is a polyatomic ion?

• Cl-

• Na+

• O2-

• SO4 2-

What charge does zinc typically have as a transition metal?

• 2+

• 1+

• 1-

• 3+

How is the formula for aluminum nitrate correctly written?

• AlN3

• AlN9

• Al3(NO3)

• Al(NO3)3

What is the charge of a nitrate ion?

• 1+

• 2-

• 1-

• 2+

Which of the following is NOT a polyatomic ion?

• NH4+

• CO3 2-

• O2-

• NO3-

Why are brackets used in the formula for compounds with polyatomic ions?

• To separate different elements

• To group the entire ion together

• To show the charge of the ion

• To indicate the number of atoms