4. Determine the M olarity of 25 grams of Pb(NO3)2 is dissolved in enough water to make 50 L of solution.

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium

Ibelieve the answer 4 moles

Reaction type : double replacement hcl + lioh = h2o + licl

So the main goal for the elements is stability which is a complete/full valence shell and typically the magic number for a stable element is 8 valence electron but not always. so elements to the left of the periodic table tend to be way less stable then those on the right, so the elements on the left are much more reactive.