Which elements are malleable and good conductors of electricity?

a) iodine and silver
b) iodine and xenon
c) tin and silver
d) tin and xenon

Those are properties of metals, so just look for which pair is made up of two metals. According to the periodic table, silver and tin are metals, so the answer is C.

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.

C) electrons encircling a nucleus with neutrons and protons