Consider the positions of carbon, nitrogen, potassium, and calcium on the periodic table. the atoms of which element attract electrons most strongly in chemical bonds? carbon (c) calcium (ca) nitrogen (n) potassium (k) mark this and return

nitrogen (N) is the right 

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.