Understanding Ionic Compounds

Which group in the periodic table contains elements that typically form cations with a +1 charge?

• Group 1

• Group 2

• Group 13

• Group 6A

What is the typical charge of ions formed by alkaline earth metals?

• +3

• +2

• -2

• +1

Which group's elements form ions with a +2 charge?

• Group 2

• Group 1

• Group 13

• Group 6A

In forming ionic compounds, what ratio do sodium and bromide ions combine in?

• 1:1

• 1:2

• 2:1

• 2:3

What is the chemical formula for calcium sulfide?

• Ca2S3

• CaS

• Ca2S

• CaS2

How do you write the formula for a compound where the cation has a +3 charge and the anion has a -1 charge?

• 3:1 ratio

• Direct combination

• 1:3 ratio

• Swap charges with subscripts

What is the correct formula for aluminum chloride?

• AlCl2

• AlCl3

• AlCl

• Al3Cl

What is the charge on aluminum when it forms an ion?

• -1

• +3

• +2

• +1

Which method is used to write the formula for compounds with different ion charges?

• Ionic balancing

• Crisscross method

• Direct combination

• Subscript swapping

What is the formula for sodium oxide using the charge swapping method?

• Na2O2

• NaO2

• Na2O

• NaO