Description

He started the development of the periodic table by grouping elements with similar properties where he noticed that the atomic mass of the middle element falls midway the atomic weight of the other 2 elements.
Law of ___________ "“all elements in the periodic table occurred in groups of three, when arranged in increasing order of atomic masses”
Law of ________________ states that " every eighth element in the periodic table has similar properties with the first element.
Proposed that chemical elements are arranged according to increasing atomic mass, those with similar physical and chemical properties occur after each interval of seven elements.
He proposed that the chemical & physical properties of elements are periodic functions of their atomic masses.
He proposed that atomic numbers, not weights, determine the factor of the arrangement of the elements with similar chemical properties.
____________ Periodic Law states that “ the chemical & physical properties of elements are periodic functions of their atomic numbers.”
How many periods are there in the periodic table?
Arrangement of elements in the periodic table in columns or groups.
Arrangement of elements in the periodic table in rows.

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