Naming chemical equations - How do you put Berylium Hydroxide into numerical form?

hellppp! exam in less than 4 hours





Potassium Sulfate - K2(SO)4


Aluminum Oxide - Al2O3


Magnesium Selenide - MgS





Berylium Hydroxide - ??????





Also, how do you tell the difference between ionic, molecular and polyatomic compounds??

Naming chemical equations - How do you put Berylium Hydroxide into numerical form?
Be(OH)2
Reply:Beryllium hydroxide - Be(OH)2





Potassium sulfate - K2SO4





The others are right. Ionic compounds usually form between metals and nonmetals. That's between elements in the left two-thirds of the periodic table with those on the right one-third. Nonmetals in the right one-third of the periodic table usually form covalent compounds with one another. Polyatomic usually refers to cations like NH4+ or anions like SO4=, which have more than one kind of atom in them.