A sample of iodine is easiest to ship as a powder because it is making it easy to break into small pieces. Helium is less .

than the elements that make up the air we breathe, so a balloon filled with helium will float in air.

Plastic is a compound of nonmetallic elements, so its .

properties make it a popular coating for electric wires to prevent the current from escaping.

*ANSWERS

1): brittle.

2): dense.

3) electrically insulating.

I hope this helped your question! (All of these answers are correct by the way :>)