What do Ai and Pb have in common on the periodic?

What is the origin of a walnut tree? What similarities and diffierences could you look at when classify organisms? Is splitting wood chemical or physical change? What are the advantages and disadvantages of the gall peters map? What is the ipsilateral side of the tongue? What type of bond is pottasium oxide? What term means not able to be dissolved? In 1985 was there a hole in the ozone layer? Will some foods rebuild tendons? How much soil dose a spider plant need? What does an eraser represent? When earth has an what of about 30 percent reflecting much of the suns radiation back into space? Why is the PH of the midpoint predicted to be the same value as the weak acid? Do you need a step down transformer to run a 208 volt steam table on 240 volt feed? What do you mean by open and closed electric circuit? Dry ice is a soild state of? 10 ml is what in tablespoons? Which bears live in south pole? How many total isomers have a molecular formula c4h11n? What is the small dark planet named after the god of the dark underworld?