Bromine and Mercury Compounds

The video tutorial explains how to write the formula for Mercury(I) bromide. It begins by introducing Mercury(I) as a unique polyatomic ion, Hg2 2+, where each mercury atom has a +1 charge, but together they form a +2 charge. The tutorial then discusses bromide, derived from bromine, which has a -1 charge. To form a neutral compound, two bromide ions are needed to balance the +2 charge of the mercury ion, resulting in the formula Hg2Br2. The video concludes with a summary of the formula and a thank you from Dr. B.

What is the charge of the polyatomic ion formed by Mercury(I)?

• 1+

• 1-

• 2+

• 2-

Which group does bromine belong to on the periodic table?

• Group 1

• Group 7

• Group 17

• Group 18

What is the charge of a single bromide ion?

• 1+

• 1-

• 2-

• 2+

How many bromide ions are needed to balance the charge of Mercury(I) in the compound?

• One

• Two

• Three

• Four

What is the correct chemical formula for Mercury(I) Bromide?

• Hg2Br

• Hg2Br2

• HgBr2

• HgBr