Consider the lattice energies of the following Group 2A compounds: BeH2, 3205 kJ/mol; MgH2, 2791 kJ/mol; CaH2, 2410 kJ/mol; SrH2, 2250 kJ/mol; BaH2, 2121 kJ/mol. (a) What is the oxidation number of H in these compounds?

Video transcript

Hi everyone for this problem, we're told to consider the lattice energy of the following Group one A. Compounds. We need to identify the ionic charges in the listed compounds. So let's refer to our periodic table here. So our compounds all have GROUP one A elements. Okay. And when we refer to our periodic table, anything that is in Group one A. has a plus one ionic charge. But we also have sulfur. And all of the compounds. Okay. And when we refer to the periodic table, sulfur has a minus two ionic charge. And so That is it for this problem because it asks us to identify the ionic charges. So our group one a Are going to have a plus one ionic charge and our sulfur is going to have a -2 ionic charge. That's the end of this problem. I hope this was helpful.