In the periodic table elements are arranged in order of increasing ____ - this tells us the number of ____ in the nucleus. Most elements are ____ and these are found on the left hand side and in the ____ of the periodic table. Non-metals are found towards the ____ of the periodic table. The periodic table has groups and periods - the rows are called ____ and the columns are called ____. Elements with the same number of electrons in their outer shell are found in the same ____. The group number is equal to the number of outer electrons. The period tells us how many electron shells are occupied. 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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