electrons and a compact nucleus of protons and neutrons.An atom is smallest constituent unit of ordinary matter that has the properties of a chemical element.the teacher ask about science like atoms and iron we had to do a work sheet and and he said we have a test Friday we had to study all week and we did work over the elements and stuff.like oxygen air and stuff and john Dalton we had to take notes and metal write things like the elements then it was the day of the test he said we have five minutes to study and we had to clear our desk off only thing we need was a pen or pencil we take the test.
