Rubidium and Iodide Compounds

The video tutorial explains how to write the formula for rubidium iodide by identifying the element symbols for rubidium (Rb) and iodide (I). It discusses the formation of ionic compounds, focusing on the charges of rubidium and iodide ions. Rubidium, being in group 1, has a +1 charge, while iodide, from group 17, has a -1 charge. The tutorial emphasizes the importance of balancing these charges to form a neutral compound. Finally, it explains how to name the compound by changing iodine to iodide.

What is the element symbol for rubidium?

• Ri

• Rb

• Ru

• Rd

Which group in the periodic table does rubidium belong to?

• Group 17

• Group 1

• Group 2

• Group 18

What is the ionic charge of an iodide ion?

• 2-

• 1+

• 1-

• 2+

Why is rubidium iodide considered a neutral compound?

• Because it has equal numbers of protons and electrons

• Because the charges of rubidium and iodide ions cancel each other out

• Because it is composed of non-metals

• Because it is a covalent compound

How do you change the name of iodine when it forms a compound with rubidium?

• Iodite

• Iodine

• Iodide

• Iodate

What is the correct name for the compound with the formula RbI?

• Rubidium Iodine

• Rubidium Iodide

• Rubidium Iodate

• Rubidium Iodite