Introduction
The periodic table
All the different elements are arranged in a chart called the periodic table.
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The horizontal rows are called periods.
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The vertical columns are called groups.
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Elements in the same group are similar to each other.
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The metals are on the left and the non-metals are on the right.
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One non-metal, hydrogen, is often put in the middle.
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The main groups are numbered from 1 to 7 going from left to right, and the last group on the right is group 0.
Process
Evaluation
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