Why is the electronegativity of an element important?

Smog is the term used to describe the combination of fog and smoke

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180