Rubidium and Bromine Compounds

The video tutorial explains how to write the formula for rubidium bromide. It begins by identifying the element symbols for rubidium (Rb) and bromine (Br), and discusses the nature of ionic compounds formed by metals and non-metals. The tutorial highlights the importance of balancing ionic charges to achieve a neutral compound, with rubidium having a +1 charge and bromine a -1 charge. The charges must sum to zero, resulting in the formula RbBr for rubidium bromide. The video concludes with a brief summary and thanks from Dr. B.

What is the chemical symbol for rubidium?

• Rd

• Ru

• Rm

• Rb

Which group in the periodic table does rubidium belong to?

• Group 18

• Group 17

• Group 2

• Group 1

What is the ionic charge of bromine when it forms an ion?

• 1-

• 1+

• 2+

• 2-

Why is rubidium bromide considered a neutral compound?

• Because it is a metal

• Because it is a covalent compound

• Because the charges of Rb+ and Br- balance each other

• Because it has equal numbers of protons and electrons

What is the correct formula for rubidium bromide?

• Rb2Br2

• RbBr2

• Rb2Br

• RbBr