I believe the answer is B.
43g id say. Due to conservation of mass that is the only one that makes even slight sense. If you had more air react then the nail would heavier
Answer 16. True 17. True 18. False 19. True 20. False
The elements calcium, gold, iron and sodium are all metals. They all have a tendency to donate their valance electrons, rather than acquiring additional valance electrons. They all form metallic bonds, in the form of a shared electron cloud. They all have the electrical conductivity and metallic luster which comes with metallic bonds.
Answer:
D. chemical alters the atomic structure of a substance, while physical does not
hope this helps!
