Answer:
false
Explanation:
because elements never exist in nature as single isotopes they are always combined
Answer: Air
Explanation: Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.
Answer:
Any Questions?
So i can give you the answer
Lithium heparin tube i think, could be wrong but i think this is right.