Beryllium and Phosphate Compounds

The video tutorial explains how to write the chemical formula for beryllium phosphate. It begins by identifying beryllium and phosphate, noting that phosphate is a polyatomic ion with a charge of 3-. The tutorial then discusses the formation of ionic compounds, emphasizing the need to balance charges to achieve a neutral compound. By using a trick to balance the charges, the final formula for beryllium phosphate is derived as Be3(PO4)2.

What is the element symbol for beryllium?

• Bi

• Br

• Be

• B

What is the charge of the phosphate ion?

• 3+

• 2-

• 3-

• 2+

Why is it necessary to balance the charges in an ionic compound?

• To make the compound reactive

• To make the compound colorful

• To increase the compound's weight

• To ensure the compound is neutral

What is the charge of beryllium in beryllium phosphate?

• 1+

• 2+

• 3+

• 4+

How do you denote multiple phosphate ions in a chemical formula?

• By using square brackets

• By using brackets

• By using curly braces

• By using parentheses

What is the final chemical formula for beryllium phosphate?

• BePO4

• Be(PO4)2

• Be2(PO4)3

• Be3(PO4)2

What is the significance of the numbers in the formula Be3(PO4)2?

• They show the number of molecules in a sample

• They are random numbers with no significance

• They indicate the number of atoms in the universe

• They represent the ratio of ions needed for charge balance