Question

state the first landmark law of period classification​

Answer 1

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The first periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic function of their atomic weights (atomic masses)." The elements having similar properties appeared in the same group (vertical column).

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Answer 2

Answer:

The first periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic function of their atomic weights (atomic masses)." The elements having similar properties appeared in the same group (vertical column).

Hᴏᴘᴇ ɪᴛs ʜᴇʟᴘs ʏᴏᴜ ❤