What does the scientist mean when he says that white blood cells would not be "fast enough or smart enough if we hadnt whipped them along by a prior immunization" HELP PLEASE I NEED TO TURN IT IN TODAY!

The se-ci  bonds is more polar  than s-br bond

Ithink its called the coefficent.

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.