Rubidium and Nitrogen Compounds

The video tutorial explains how to write the chemical formula for rubidium nitride. It begins by identifying the symbols for rubidium (Rb) and nitride (N) and discusses the ionic nature of the compound. Rubidium, being in group 1, has a +1 charge, while nitrogen, in group 15, has a -3 charge. To balance the charges and form a neutral compound, three rubidium ions are needed for every nitrogen ion, resulting in the formula Rb3N. The tutorial concludes with a summary of the process.

What is the chemical symbol for rubidium?

• Rb

• Ru

• Rd

• Rn

Which group on the periodic table does rubidium belong to?

• Group 1

• Group 2

• Group 15

• Group 18

What is the ionic charge of nitrogen in rubidium nitride?

• 1+

• 2-

• 4+

• 3-

How many rubidium ions are needed to balance the charge of one nitrogen ion in rubidium nitride?

• 4

• 2

• 3

• 1

What is the correct formula for rubidium nitride?

• Rb4N

• Rb3N

• Rb2N

• RbN