1. The standard heat of formation for aqueous LiOH is -508 kJ/mol, and the standard heat of formation for aqueous CSOH is -488 kJ/mol. Which would
give off more energy after reacting completely with water, 1 gram of lithium or
1 gram of cesium?

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.