How did Mendeleev improve upon Newland's arrangement of the CHEMICAL ELEMENTS? He arranged elements in order of the number of electrons in their outer shell so that elements of SIMILAR MASS appeared in columns He kept elements in order of atomic mass but added "made-up' elements in the pattern so that those with SIMILAR PROPERTIES appeared in the same groups He swapped COLUMNS for ROWS and hoped for the best He kept elements in order of atomic mass but, where necessary, inserted spaces in the pattern so that those with SIMILAR PROPERTIES appeared in the same groups

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How did Mendeleev improve upon Newland's arrangement of the CHEMICAL ELEMENTS? He arranged elements in order of the number of electrons in their outer shell so that elements of SIMILAR MASS appeared in columns He kept elements in order of atomic mass but added "made-up' elements in the pattern so that those with SIMILAR PROPERTIES appeared in the same groups He swapped COLUMNS for ROWS and hoped for the best He kept elements in order of atomic mass but, where necessary, inserted spaces in the pattern so that those with SIMILAR PROPERTIES appeared in the same groups

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### He kept elements in order of atomic mass but, where necessary, inserted spaces in the pattern so that those with SIMILAR PROPERTIES appeared in the same groups

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## Step 1: Understanding Newland's Arrangement### Newland's arrangement was based on the Law of Octaves, where elements were arranged by increasing atomic mass, but he did not account for elements with similar properties appearing in the same group.## Step 2: Identifying Mendeleev's Improvement### Mendeleev improved upon this by keeping elements in order of atomic mass but inserted spaces where necessary to ensure elements with similar properties appeared in the same groups. This allowed for a more accurate grouping of elements with similar chemical properties.#

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