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4. Atoms and Elements - Part 1 of 2
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4. Atoms and Elements - Part 1 of 2
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4. Atoms and Elements / Periodic Table: Classifications / Problem 21
Problem 21
Why is the 'invisible staircase' significant in the periodic table?
A
It helps locate the metalloids.
B
It helps locate the transition metals.
C
It marks the boundary between metals and nonmetals.
D
It separates the noble gases from other elements.
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