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20 votes
20 votes
The periodic table is arranged in order by which classification?.

User Prapti
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1 Answer

14 votes
14 votes

Answer:

Atomic weight and valence electrons

Step-by-step explanation:

These variables allow Mendeleev to place each element in a certain row and column. The table comprises 7 rows and 18 columns.

User Nitish Koundade
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