Convert 127.34 grams of lithium nitrate to the number of molecules... explain steps please

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.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.