Rubidium and Phosphate Chemistry

The video tutorial explains how to write the chemical formula for rubidium phosphate. It begins by identifying rubidium and phosphate, highlighting that phosphate is a polyatomic ion with a 3- charge. The tutorial discusses the ionic nature of the compound, emphasizing the need for charge balance. Rubidium, being in group one, has a 1+ charge. To balance the charges, three rubidium ions are needed for one phosphate ion, resulting in the formula Rb3PO4. The video concludes with a summary of the process.

What is the element symbol for rubidium?

• Re

• Rb

• Ru

• Rh

What does the suffix 'ate' in phosphate indicate?

• A single element

• A noble gas

• A polyatomic ion

• A metal

What is the charge of the phosphate ion?

• 3+

• 3-

• 1-

• 2-

In which group is rubidium found on the periodic table?

• Group 3

• Group 4

• Group 2

• Group 1

What is the ionic charge of rubidium?

• 2+

• 1-

• 1+

• 3+

How many rubidium ions are needed to balance one phosphate ion?

• 3

• 2

• 4

• 1

What is the chemical formula for rubidium phosphate?

• Rb4PO4

• Rb3PO4

• Rb2PO4

• RbPO4