Question

(1) Mendeleev's periodic table and Modern periodic table
Please tell me the difference between and key words
please ​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

mendleev periodic table

elements are arranged in order or increasing atomic mass. there are nine vertical columns called groups

there is no place for noble gases

there is no place for Isotopes

transition elements are placed together in groups

Explanation:

mendleev periodic table