Answer:
B is the correct answer
Explanation:
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Answer: The bold staircase in the periodic table allows us to classify which elements are metalloids.
Explanation: Additionally, it acts like a "divider" that allows us to properly distinguish the metals from the non-metals in the periodic table.
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Lithium heparin tube i think, could be wrong but i think this is right.
It is topsoil, subsoil, and parent material
