Lewis structure of Hydrogen bromide (HBr) contains only one H-Br bond. There are no charges on atoms in HBr lewis structure because HBr is a neutral molecule. There is three lone pairs on bromine atom in HBr molecule. HBr is a very easy lewis structure to draw due to its simplicity.
There are only one hydrogen atom and one bromine atom in HBr molecule. In the lewis structure of HBr, hydrogen atom has made a single bond with bromine atom.
When we draw a lewis structure, there are several steps to follow. Number of steps can be changed according the complexity of the molecule or ion. Because HBr molecule is a simple molecule and there is no overall charge, all of these steps are not required to use to complete the lewis structure. However those all steps are mentioned and explained in detail in this tutorial for your knowledge.
There are two elements in hydrogen bromide; hydrogen and bromine. Hydrogen is a group IA element in the periodic table and only has one electron in its last shell (valence shell). Bromine is a group VIIA element in the periodic table and contains seven electrons in its last shell. Now, we know how many electrons are there in valence shells of hydrogen and bromine atoms.
Total valance electrons pairs = σ bonds + π bonds + lone pairs at valence shells
Total electron pairs are determined by dividing the number total valence electrons by two. For, HBr, Total pairs of electrons are four in their valence shells.
Because, there are only two elements in HBr molecule, we do not need to worry about finding the center atom. Therefore, we can draw the skeleton of HBr easily.
After determining the center atom and sketch of HBr molecule, we can start to mark lone pairs on atoms. Remember that, there are total of four electron pairs.
There are no charges on hydrogen atom and HBr atom. Also, remember that HBr is a molecule which does not have a charge. Therefore, not having charges on every atoms tells us we have drawn a stable structure.
Because there are no charges on atoms, no need to worry about reducing charges as a step of obtaining the best lewis structure. Therefore, we have already got the best lewis structure for HBr.