Features of Mandeleev's preodic table.

1.	Features of Mandeleev's preodic table.
Answer» Characteristics of Mendeleev's periodic table: i) Elements arranged in increased atomic mass. Elements, with similar properties GROUPED together in periods (HORIZONTAL rows) and columns (vertical rows). II) There are SEVEN periods and EIGHT columns.

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Characteristics of Mendeleev's periodic table:

i) Elements arranged in increased atomic mass. Elements, with similar properties GROUPED together in periods (HORIZONTAL rows) and columns (vertical rows).

II) There are SEVEN periods and EIGHT columns.

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Features of Mandeleev's preodic table.​

Characteristics of Mendeleev's periodic table:

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Features of Mandeleev's preodic table.