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1. How do Scientist and Chemist develop Periodic Table?
a It started by arranging the elements according to similar properties and increasing
atomic masses, finally it was arranged according to the increasing atomic number
of elements.
b. It started with Johann Dobereiner in his triad arrangement of elements.
a John Newlands of his proposed Law of Octaves with the similarities of properties
and increasing atomic masses
d Lothar Meyer and Dmitri Mendeleev determined a way to put elements in order
according to similarities in properties and increasing atomic masses, both of them
also left blank spaces on tables, believing that these spaces will be filled later with
elements yet to be discovered.​

Sagot :

Jacinastheaidn

Answer:

A. it started by arranging the elements according to similar properties and increasing

atomic masses, finally it was arranged according to the increasing atomic number

of elements.

Explanation:

In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.

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