In the periodic table elements are arranged in order of increasing ____ or proton number. Most elements are ____ and these are found on the left hand side and in the ____ of the periodic table. Elements with the same number of electrons in their outer shell are found in the same ____. Newlands' periodic table arranged elements in order of their atomic ____. In this table some elements were not grouped according to their ____. His periodic table was not accepted by other ____. Mendeleev also arranged the elements in order of their ____ mass. He made sure elements with similar properties were in the same ____. Mendeleev improved the earlier periodic table by leaving ____ for ____ elements. Elements in the modern periodic table are put in order of atomic ____.

Periodic Table

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